deliverable/linux.git
8 years agofs/btrfs/inode.c: remove unnecessary new_valid_dev() check
Yaowei Bai [Mon, 9 Nov 2015 22:58:34 +0000 (14:58 -0800)] 
fs/btrfs/inode.c: remove unnecessary new_valid_dev() check

new_valid_dev() always returns 1, so the !new_valid_dev() check is not
needed.  Remove it.

Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <jbacik@fb.com>
Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agofs/9p: remove unnecessary new_valid_dev() checks
Yaowei Bai [Mon, 9 Nov 2015 22:58:31 +0000 (14:58 -0800)] 
fs/9p: remove unnecessary new_valid_dev() checks

new_valid_dev() always returns 1, so the !new_valid_dev() check is not
needed.  Remove it.

Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoinclude/linux/kdev_t.h: old/new_valid_dev() can return bool
Yaowei Bai [Mon, 9 Nov 2015 22:58:28 +0000 (14:58 -0800)] 
include/linux/kdev_t.h: old/new_valid_dev() can return bool

Make old/new_valid_dev return bool due to these two particular functions
only using either one or zero as their return value.

No functional change.

Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoinclude/linux/kdev_t.h: remove unused huge_valid_dev()
Yaowei Bai [Mon, 9 Nov 2015 22:58:26 +0000 (14:58 -0800)] 
include/linux/kdev_t.h: remove unused huge_valid_dev()

There's no user of huge_valid_dev() any more, so remove it.

No functional change.

Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agokmap_atomic_to_page() has no users, remove it
Nicolas Pitre [Mon, 9 Nov 2015 22:58:23 +0000 (14:58 -0800)] 
kmap_atomic_to_page() has no users, remove it

Removal started in commit 5bbeed12bdc3 ("sparc32: drop unused
kmap_atomic_to_page").  Let's do it across the whole tree.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agodrivers/scsi/cxgbi: fix build with EXTRA_CFLAGS
Jiri Slaby [Mon, 9 Nov 2015 22:58:21 +0000 (14:58 -0800)] 
drivers/scsi/cxgbi: fix build with EXTRA_CFLAGS

EXTRA_CFLAGS are intended to be used on the command line, not by Kbuild.
In case of cxgbi drivers, use of EXTRA_CFLAGS results in a compilation
failure:

  drivers/scsi/cxgbi/cxgb4i/cxgb4i.c:24:21: fatal error: t4_regs.h: No such file or directory

when building like:

$ make drivers/scsi/cxgbi/ EXTRA_CFLAGS=-Wwhatever

Use ccflags-y instead of EXTRA_CFLAGS.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agodma: remove external references to dma_supported
Christoph Hellwig [Mon, 9 Nov 2015 22:58:18 +0000 (14:58 -0800)] 
dma: remove external references to dma_supported

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoDocumentation/sysctl/vm.txt: fix misleading code reference of overcommit_memory
Chun Chen [Mon, 9 Nov 2015 22:58:15 +0000 (14:58 -0800)] 
Documentation/sysctl/vm.txt: fix misleading code reference of overcommit_memory

The origin document references to cap_vm_enough_memory is because
cap_vm_enough_memory invoked __vm_enough_memory before and it no longer
does now.

Signed-off-by: Chun Chen <ramichen@tencent.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoremove abs64()
Andrew Morton [Mon, 9 Nov 2015 22:58:13 +0000 (14:58 -0800)] 
remove abs64()

Switch everything to the new and more capable implementation of abs().
Mainly to give the new abs() a bit of a workout.

Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agokernel.h: make abs() work with 64-bit types
Michal Nazarewicz [Mon, 9 Nov 2015 22:58:10 +0000 (14:58 -0800)] 
kernel.h: make abs() work with 64-bit types

For 64-bit arguments, the abs macro casts it to an int which leads to
lost precision and may cause incorrect results.  To deal with 64-bit
types abs64 macro has been introduced but still there are places where
abs macro is used incorrectly.

To deal with the problem, expand abs macro such that it operates on s64
type when dealing with 64-bit types while still returning long when
dealing with smaller types.

This fixes one known bug (per John):

The internal clocksteering done for fine-grained error correction uses a
: logarithmic approximation, so any time adjtimex() adjusts the clock
: steering, timekeeping_freqadjust() quickly approximates the correct clock
: frequency over a series of ticks.
:
: Unfortunately, the logic in timekeeping_freqadjust(), introduced in commit
dc491596f639438 (Rework frequency adjustments to work better w/ nohz),
: used the abs() function with a s64 error value to calculate the size of
: the approximated adjustment to be made.
:
: Per include/linux/kernel.h: "abs() should not be used for 64-bit types
: (s64, u64, long long) - use abs64()".
:
: Thus on 32-bit platforms, this resulted in the clocksteering to take a
: quite dampended random walk trying to converge on the proper frequency,
: which caused the adjustments to be made much slower then intended (most
: easily observed when large adjustments are made).

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Reported-by: John Stultz <john.stultz@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agosparc/sparc64: allocate sys_membarrier system call number
Mathieu Desnoyers [Mon, 9 Nov 2015 22:58:06 +0000 (14:58 -0800)] 
sparc/sparc64: allocate sys_membarrier system call number

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomips: add entry for new mlock2 syscall
Eric B Munson [Mon, 9 Nov 2015 22:58:03 +0000 (14:58 -0800)] 
mips: add entry for new mlock2 syscall

A previous commit introduced the new mlock2 syscall, add entries for the
MIPS architecture.

Signed-off-by: Eric B Munson <emunson@akamai.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agofs/writeback.c: fix kernel-doc warnings
Randy Dunlap [Mon, 9 Nov 2015 22:58:00 +0000 (14:58 -0800)] 
fs/writeback.c: fix kernel-doc warnings

Fix kernel-doc warnings in fs/fs-writeback.c by moving a #define macro to
after the function's opening brace.  Also #undef this macro at the end of
the function.

  ../fs/fs-writeback.c:1984: warning: Excess function parameter 'inode' description in 'I_DIRTY_INODE'
  ../fs/fs-writeback.c:1984: warning: Excess function parameter 'flags' description in 'I_DIRTY_INODE'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agofs/inode.c: fix kernel-doc warning
Randy Dunlap [Mon, 9 Nov 2015 22:57:58 +0000 (14:57 -0800)] 
fs/inode.c: fix kernel-doc warning

Fix kernel-doc warning in fs/inode.c:

  ../fs/inode.c:1606: warning: No description found for parameter 'inode'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agodrm/vc4: Add dependency on HAVE_DMA_ATTRS, and select DRM_GEM_CMA_HELPER
Guenter Roeck [Mon, 2 Nov 2015 00:31:52 +0000 (16:31 -0800)] 
drm/vc4: Add dependency on HAVE_DMA_ATTRS, and select DRM_GEM_CMA_HELPER

Avoid the following build errors, seen with m68k:allmodconfig and other
architectures which do not support HAVE_DMA_ATTRS.

ERROR: "drm_gem_cma_create" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_prime_mmap" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_prime_get_sg_table" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_vm_ops" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_mmap" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_prime_vunmap" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_prime_import_sg_table" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_free_object" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_prime_vmap" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_dumb_map_offset" [drivers/gpu/drm/vc4/vc4.ko] undefined!
ERROR: "drm_gem_cma_create" [drivers/gpu/drm/drm_kms_helper.ko] undefined!
ERROR: "drm_gem_cma_describe" [drivers/gpu/drm/drm_kms_helper.ko] undefined!
ERROR: "drm_gem_cma_free_object" [drivers/gpu/drm/drm_kms_helper.ko] undefined!

Acked-by: Eric Anholt <eric@anholt.net>
Fixes: c8b75bca92cb ("drm/vc4: Add KMS support for Raspberry Pi.")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoMAINTAINERS: Change Meta arch port status to Odd Fixes
James Hogan [Mon, 9 Nov 2015 18:40:59 +0000 (18:40 +0000)] 
MAINTAINERS: Change Meta arch port status to Odd Fixes

For a while now the Meta architecture port has been supported with only
odd fixes rather than any big new features, since it has now been
effectively supersceded by MIPS, and there is no prospect of any new
products being based on it. Change the maintenance status to Odd Fixes
in order to reflect reality.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-metag@vger.kernel.org
8 years agocoredump: add DAX filtering for FDPIC ELF coredumps
Ross Zwisler [Mon, 5 Oct 2015 22:33:37 +0000 (16:33 -0600)] 
coredump: add DAX filtering for FDPIC ELF coredumps

Add explicit filtering for DAX mappings to FDPIC ELF coredump.  This is
useful because DAX mappings have the potential to be very large.

This patch has only been compile tested.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
8 years agocoredump: add DAX filtering for ELF coredumps
Ross Zwisler [Mon, 5 Oct 2015 22:33:36 +0000 (16:33 -0600)] 
coredump: add DAX filtering for ELF coredumps

Add two new flags to the existing coredump mechanism for ELF files to
allow us to explicitly filter DAX mappings.  This is desirable because
DAX mappings, like hugetlb mappings, have the potential to be very
large.

Update the coredump_filter documentation in
Documentation/filesystems/proc.txt so that it addresses the new DAX
coredump flags.  Also update the documented default value of
coredump_filter to be consistent with the core(5) man page.  The
documentation being updated talks about bit 4, Dump ELF headers, which
is enabled if CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is turned on in the
kernel config.  This kernel config option defaults to "y" if both ELF
binaries and coredump are enabled.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
8 years agoMerge branch 'for-4.4/hotplug' into libnvdimm-for-next
Dan Williams [Mon, 9 Nov 2015 18:29:39 +0000 (13:29 -0500)] 
Merge branch 'for-4.4/hotplug' into libnvdimm-for-next

8 years agonet: Documentation: Fix default value tcp_limit_output_bytes
Niklas Cassel [Mon, 9 Nov 2015 14:59:00 +0000 (15:59 +0100)] 
net: Documentation: Fix default value tcp_limit_output_bytes

Commit c39c4c6abb89 ("tcp: double default TSQ output bytes limit")
updated default value for tcp_limit_output_bytes

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomacvtap: Resolve possible __might_sleep warning in macvtap_do_read()
Vlad Yasevich [Mon, 9 Nov 2015 14:14:17 +0000 (09:14 -0500)] 
macvtap: Resolve possible __might_sleep warning in macvtap_do_read()

macvtap_do_read code calls macvtap_put_user while it might be set up
to wait for the user.  This results in the following warning:

Jun 23 16:25:26 galen kernel: ------------[ cut here ]------------
Jun 23 16:25:26 galen kernel: WARNING: CPU: 0 PID: 30433 at kernel/sched/core.c:
7286 __might_sleep+0x7f/0x90()
Jun 23 16:25:26 galen kernel: do not call blocking ops when !TASK_RUNNING; state
=1 set at [<ffffffff810f1c1f>] prepare_to_wait+0x2f/0x90
Jun 23 16:25:26 galen kernel: CPU: 0 PID: 30433 Comm: cat Not tainted 4.1.0-rc6+
 #11
Jun 23 16:25:26 galen kernel: Call Trace:
Jun 23 16:25:26 galen kernel: [<ffffffff817f76ba>] dump_stack+0x4c/0x65
Jun 23 16:25:26 galen kernel: [<ffffffff810a07ca>] warn_slowpath_common+0x8a/0xc
0
Jun 23 16:25:26 galen kernel: [<ffffffff810a0846>] warn_slowpath_fmt+0x46/0x50
Jun 23 16:25:26 galen kernel: [<ffffffff810f1c1f>] ?  prepare_to_wait+0x2f/0x90
Jun 23 16:25:26 galen kernel: [<ffffffff810f1c1f>] ?  prepare_to_wait+0x2f/0x90
Jun 23 16:25:26 galen kernel: [<ffffffff810cdc1f>] __might_sleep+0x7f/0x90
Jun 23 16:25:26 galen kernel: [<ffffffff811f8e15>] might_fault+0x55/0xb0
Jun 23 16:25:26 galen kernel: [<ffffffff810fab9d>] ?  trace_hardirqs_on_caller+0x fd/0x1c0
Jun 23 16:25:26 galen kernel: [<ffffffff813f639c>] copy_to_iter+0x7c/0x360
Jun 23 16:25:26 galen kernel: [<ffffffffa052da86>] macvtap_do_read+0x256/0x3d0 [macvtap]
Jun 23 16:25:26 galen kernel: [<ffffffff810f20e0>] ?  prepare_to_wait_event+0x110/0x110
Jun 23 16:25:26 galen kernel: [<ffffffffa052dcab>] macvtap_read_iter+0x2b/0x50 [macvtap]
Jun 23 16:25:26 galen kernel: [<ffffffff81247f2e>] __vfs_read+0xae/0xe0
Jun 23 16:25:26 galen kernel: [<ffffffff81248526>] vfs_read+0x86/0x140
Jun 23 16:25:26 galen kernel: [<ffffffff812493b9>] SyS_read+0x49/0xb0
Jun 23 16:25:26 galen kernel: [<ffffffff8180182e>] system_call_fastpath+0x12/0x76
Jun 23 16:25:26 galen kernel: ---[ end trace 22e33f67e70c0c2a ]---

Make sure thet we call finish_wait() if we have the skb to process
before trying to actually process it.

Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomvneta: add FIXED_PHY dependency
Arnd Bergmann [Mon, 9 Nov 2015 14:08:57 +0000 (15:08 +0100)] 
mvneta: add FIXED_PHY dependency

The fixed_phy infrastructure is done in a way that is optional,
by providing 'static inline' helper functions doing nothing in
include/linux/phy_fixed.h for all its APIs. However, three out
of the four users (DSA, BCMGENET, and SYSTEMPORT) always
'select FIXED_PHY', presumably because they need that.
MVNETA is the fourth one, and if that is built-in but FIXED_PHY
is configured as a loadable module, we get a link error:

drivers/built-in.o: In function `mvneta_fixed_link_update':
fpga-mgr.c:(.text+0x33ed80): undefined reference to `fixed_phy_update_state'

Presumably this driver has the same dependency as the others,
so this patch also uses 'select' to ensure that the fixed-phy
support is built-in.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 898b2970e2c9 ("mvneta: implement SGMII-based in-band link state signaling")
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: caif: check return value of alloc_netdev
Rasmus Villemoes [Mon, 9 Nov 2015 12:19:10 +0000 (13:19 +0100)] 
net: caif: check return value of alloc_netdev

I don't know if dev can actually be NULL here, but the test should be
above alloc_netdev(), to avoid leaking the struct net_device in case
dev is actually NULL. And of course the return value from alloc_netdev
should be tested.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hisilicon: NET_VENDOR_HISILICON should depend on HAS_DMA
Geert Uytterhoeven [Mon, 9 Nov 2015 09:34:30 +0000 (10:34 +0100)] 
net: hisilicon: NET_VENDOR_HISILICON should depend on HAS_DMA

If NO_DMA=y:

    ERROR: "dma_set_mask" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_unmap_page" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_map_page" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_supported" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/hisilicon/hns/hns_enet_drv.ko] undefined!
    ERROR: "dma_set_mask" [drivers/net/ethernet/hisilicon/hns/hns_dsaf.ko] undefined!
    ERROR: "dma_supported" [drivers/net/ethernet/hisilicon/hns/hns_dsaf.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_unmap_page" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_map_page" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/hisilicon/hns/hnae.ko] undefined!
    ERROR: "dma_alloc_coherent" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_free_coherent" [drivers/net/ethernet/hisilicon/hix5hd2_gmac.ko] undefined!
    ERROR: "dma_alloc_coherent" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!
    ERROR: "dma_mapping_error" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!
    ERROR: "dma_map_single" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!
    ERROR: "dma_unmap_single" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!
    ERROR: "dma_free_coherent" [drivers/net/ethernet/hisilicon/hip04_eth.ko] undefined!

As this affects all of HNS_ENET, HNS_DSAF, HNS, HIX5HD2_GMAC, and
HIP04_ETH, add a dependency on HAS_DMA to the main NET_VENDOR_HISILICON
symbol to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoGFS2: Fix rgrp end rounding problem for bsize < page size
Bob Peterson [Wed, 28 Oct 2015 14:05:31 +0000 (09:05 -0500)] 
GFS2: Fix rgrp end rounding problem for bsize < page size

This patch fixes a bug introduced by commit 7005c3e. That patch
tries to map a vm range for resource groups, but the calculation
breaks down when the block size is less than the page size.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
8 years agohwmon: (k10temp) Remove duplicate pci-id define
Adam Majer [Mon, 9 Nov 2015 09:14:29 +0000 (10:14 +0100)] 
hwmon: (k10temp) Remove duplicate pci-id define

PCI_DEVICE_ID_AMD_15H_M60H_NB_F3 is now defined in pci_ids.h

Signed-off-by: Adam Majer <adamm@zombino.com>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
8 years agonios2: Remove unnecessary #ifdef guards
Tobias Klauser [Fri, 6 Nov 2015 06:19:11 +0000 (14:19 +0800)] 
nios2: Remove unnecessary #ifdef guards

__HAVE_ARCH_MEMMOVE and __HAVE_ARCH_MEMSET are unconditionally defined
for nios2, so there is no need to protect the function definitions of
memmove() and memset().

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Ley Foon Tan <lftan@altera.com>
8 years agonios2: Switch to generic __xchg()
Marek Vasut [Wed, 30 Sep 2015 14:08:00 +0000 (22:08 +0800)] 
nios2: Switch to generic __xchg()

The generic __xchg() implementation present in asm-generic/cmpxchg.h is
correct on nios2 and even generates the same code. Switch to this generic
implementation to trim down the amount of ad-hoc copies of the code.

Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Ley Foon Tan <lftan@altera.com>
8 years agonios2: Fix unused variable warning
Marek Vasut [Wed, 30 Sep 2015 14:06:46 +0000 (22:06 +0800)] 
nios2: Fix unused variable warning

Fix the following compiler splat by adding __maybe_unused annotation to
the variable. Using this particular annotation has the least ugly impact
on the code compared to using ifdeffery.

arch/nios2/kernel/setup.c: In function 'nios2_boot_init':
arch/nios2/kernel/setup.c:107:7: warning: unused variable 'cmdline_passed' [-Wunused-variable]
  char cmdline_passed[COMMAND_LINE_SIZE] = { 0, };
       ^

Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Ley Foon Tan <lftan@altera.com>
8 years agodrivers: net: xgene: fix RGMII 10/100Mb mode
Iyappan Subramanian [Sat, 7 Nov 2015 19:50:40 +0000 (11:50 -0800)] 
drivers: net: xgene: fix RGMII 10/100Mb mode

This patch fixes the RGMII 10/100M mode by reprogramming the clock.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Tested-by: Fushen Chen <fchen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'skb_to_full_sk'
David S. Miller [Mon, 9 Nov 2015 01:56:39 +0000 (20:56 -0500)] 
Merge branch 'skb_to_full_sk'

Eric Dumazet says:

====================
net: add skb_to_full_sk() helper

Many contexts need to reach listener socket from skb attached
to a request socket. This patch series add skb_to_full_sk() to
clearly express this need and use it where appropriate.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonetfilter: nft_meta: use skb_to_full_sk() helper
Eric Dumazet [Sun, 8 Nov 2015 18:54:12 +0000 (10:54 -0800)] 
netfilter: nft_meta: use skb_to_full_sk() helper

SYNACK packets might be attached to request sockets.

Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: em_meta: use skb_to_full_sk() helper
Eric Dumazet [Sun, 8 Nov 2015 18:54:11 +0000 (10:54 -0800)] 
net_sched: em_meta: use skb_to_full_sk() helper

SYNACK packets might be attached to request sockets.

Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosched: cls_flow: use skb_to_full_sk() helper
Eric Dumazet [Sun, 8 Nov 2015 18:54:10 +0000 (10:54 -0800)] 
sched: cls_flow: use skb_to_full_sk() helper

SYNACK packets might be attached to request sockets.

Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonetfilter: xt_owner: use skb_to_full_sk() helper
Eric Dumazet [Sun, 8 Nov 2015 18:54:09 +0000 (10:54 -0800)] 
netfilter: xt_owner: use skb_to_full_sk() helper

SYNACK packets might be attached to a request socket,
xt_owner wants to gte the listener in this case.

Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosmack: use skb_to_full_sk() helper
Eric Dumazet [Sun, 8 Nov 2015 18:54:08 +0000 (10:54 -0800)] 
smack: use skb_to_full_sk() helper

This module wants to access sk->sk_security, which is not
available for request sockets.

Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: add skb_to_full_sk() helper and use it in selinux_netlbl_skbuff_setsid()
Eric Dumazet [Sun, 8 Nov 2015 18:54:07 +0000 (10:54 -0800)] 
net: add skb_to_full_sk() helper and use it in selinux_netlbl_skbuff_setsid()

Generalize selinux_skb_sk() added in commit 212cd0895330
("selinux: fix random read in selinux_ip_postroute_compat()")
so that we can use it other contexts.

Use it right away in selinux_netlbl_skbuff_setsid()

Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'nfc-fixes-4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo...
David S. Miller [Mon, 9 Nov 2015 01:47:26 +0000 (20:47 -0500)] 
Merge tag 'nfc-fixes-4.4-1' of git://git./linux/kernel/git/sameo/nfc-fixes

Samuel Ortiz says:

====================
NFC 4.4 fixes

This is the 1st NFC fixes pull request for 4.4.

It includes bug fixes and one fix for a build failure, all of them
introduced with the first NFC pull request for 4.4.

We have:

- Fix nfcmrvl SPI driver potential build error due to a broken Kconfig
  dependency.
- A few fixes for the firmware download implementation for the nfcmrvl
  UART driver.
- A GPIO allocation leak for the nfcmrvl driver.
- One code simplification for the nfcmrvl DT handling.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobpf: doc: correct arch list for supported eBPF JIT
Yang Shi [Sat, 7 Nov 2015 05:38:58 +0000 (21:38 -0800)] 
bpf: doc: correct arch list for supported eBPF JIT

aarch64 and s390x support eBPF JIT too, correct document to reflect this and
avoid any confusion.

Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'xtensa-for-next-20151109' of git://github.com/jcmvbkbc/linux-xtensa
Chris Zankel [Sun, 8 Nov 2015 23:12:47 +0000 (23:12 +0000)] 
Merge tag 'xtensa-for-next-20151109' of git://github.com/jcmvbkbc/linux-xtensa

Xtensa improvements for 4.4:

- fix remaining issues with noMMU cores;
- fix build for cores w/o cache or zero overhead loop options;
- fix boot of secondary cores in SMP configuration;
- add support for DMA to high memory pages;
- add dma_to_phys and phys_to_dma functions.

8 years agoxtensa: implement dma_to_phys and phys_to_dma
Max Filippov [Sat, 7 Nov 2015 03:59:51 +0000 (06:59 +0300)] 
xtensa: implement dma_to_phys and phys_to_dma

This fixes the following build error seen in -next:

  drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c:143:2: error:
  implicit declaration of function 'dma_to_phys'

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
8 years agoxtensa: support DMA to high memory
Max Filippov [Thu, 8 Oct 2015 23:44:23 +0000 (02:44 +0300)] 
xtensa: support DMA to high memory

- don't bugcheck if high memory page is passed to xtensa_map_page;
- turn empty dcache flush macros into functions so that they could be
  passed as function parameters;
- use kmap_atomic to map high memory pages for cache invalidation/
  flushing performed by xtensa_sync_single_for_{cpu,device}.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
8 years agoraid5-cache: add crc32c Kconfig dependency
Arnd Bergmann [Tue, 3 Nov 2015 14:12:01 +0000 (15:12 +0100)] 
raid5-cache: add crc32c Kconfig dependency

The recent change of the raid5-cache code to use crc32c instead
of crc32 causes link errors when CONFIG_LIBCRC32C is disabled:

drivers/built-in.o: In function crc32c'
core.c:(.text+0x1c6060): undefined reference to `crc32c'

This adds an explicit 'select' statement like all other users
of this function do.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 5cb2fbd6ea0d ("raid5-cache: use crc32c checksum")
Signed-off-by: NeilBrown <neilb@suse.com>
8 years agoNTB: fix 32-bit compiler warning
Arnd Bergmann [Wed, 7 Oct 2015 07:59:34 +0000 (09:59 +0200)] 
NTB: fix 32-bit compiler warning

resource_size_t may be 32-bit wide on some architectures, which causes
this warning when building the NTB code:

drivers/ntb/ntb_transport.c: In function 'ntb_transport_link_work':
drivers/ntb/ntb_transport.c:828:46: warning: right shift count >= width of type [-Wshift-count-overflow]

The warning is harmless but can be avoided by using the upper_32_bits()
macro.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: e26a5843f7f5 ("NTB: Split ntb_hw_intel and ntb_transport drivers")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
8 years agoNTB: unify translation addresses
Dave Jiang [Thu, 24 Sep 2015 20:03:05 +0000 (13:03 -0700)] 
NTB: unify translation addresses

There is no need for the upstream and downstream addresses to be different
for the NTB configs. Go to using a single set of address. It is still
possible to configure them differently using module parameter override
however.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked and Tested-by: Allen Hubbe <Allen.Hubbe@emc.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
8 years agoNTB: invalid buf pointer in multi-MW setups
Jon Mason [Mon, 5 Oct 2015 02:54:22 +0000 (22:54 -0400)] 
NTB: invalid buf pointer in multi-MW setups

Order of operations issue with the QP Num and MW count, which would
result in the receive buffer pointer being invalid if there are more
than 1 MW.  Corrected with parenthesis to enforce the proper order of
operations.

Reported-by: John I. Kading <John.Kading@gd-ms.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
8 years agoNTB: remove unused variable
Sudip Mukherjee [Sat, 3 Oct 2015 08:09:42 +0000 (13:39 +0530)] 
NTB: remove unused variable

These variables were not used anywhere. So remove them.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
8 years agoNTB: fix access of free-ed pointer
Sudip Mukherjee [Sat, 3 Oct 2015 08:09:41 +0000 (13:39 +0530)] 
NTB: fix access of free-ed pointer

We were accessing nt->mw_vec after freeing it. Fix the error path so
that we free nt->mw_vec after we have finished using it.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
8 years agoNTB: Fix issue where we may be accessing NULL ptr
Dave Jiang [Thu, 17 Sep 2015 20:27:04 +0000 (13:27 -0700)] 
NTB: Fix issue where we may be accessing NULL ptr

smatch detected an issue in the function ntb_transport_max_size() where
we could be dereferencing a dma channel pointer when it is NULL.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
8 years agoparisc: Fixes and cleanups in kernel uapi header files
Helge Deller [Fri, 6 Nov 2015 22:36:01 +0000 (23:36 +0100)] 
parisc: Fixes and cleanups in kernel uapi header files

This patch fixes some bugs and partly cleans up the parisc uapi header
files to what glibc defined:
- compat_semid64_ds was wrong and did not take the endianess into
  account
- ipc64_perm exported userspace types which broke building userspace
  packages on debian (e.g. trinity)
- ipc64_perm needs to use a 32bit mode_t on 64bit kernel
- msqid64_ds and semid64_ds needs unsigned longs for various struct members
- shmid64_ds exported size_t instead of __kernel_size_t

And finally add some compile-time checks for the sizes of those structs
to avoid future breakage.

Runtime-tested with the Linux Test Project (LTP) testsuite.

Cc: <stable@vger.kernel.org> # 3.18+
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agoparisc: Drop hpux_stat64 struct from stat.h header file
Helge Deller [Wed, 28 Oct 2015 20:40:18 +0000 (21:40 +0100)] 
parisc: Drop hpux_stat64 struct from stat.h header file

The struct hpux_stat64 is not needed any longer since we dropped HP-UX
support in commit 04c1614 ("parisc: hpux - Drop support for HP-UX
binaries").

Signed-off-by: Helge Deller <deller@gmx.de>
8 years agortc: Add a driver for Micro Crystal RV8803
Alexandre Belloni [Mon, 2 Nov 2015 22:48:32 +0000 (23:48 +0100)] 
rtc: Add a driver for Micro Crystal RV8803

This driver supports the following functions:
 - reading and settings time
 - alarms when connected to an IRQ
 - reading and clearing the voltage low flags
 - nvram

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: s3c: Set year, month, day value for setting alarm
Krzysztof Kozlowski [Sun, 1 Nov 2015 11:49:04 +0000 (20:49 +0900)] 
rtc: s3c: Set year, month, day value for setting alarm

This patch sets year, month, day value for set_alarm function.
The current driver omits to set the values.

This fixes setting wake alarm for dates different than current day.
Without the patch the alarm scheduled for tomorrow would fire today on
chosen time.

Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.kim@samsung.com>
Signed-off-by: KyungMin Park <kyungmin.park@samsung.com>
[k.kozlowski: Rebase and test the patch, update commit message]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: ds1307: Fix alarm programming for mcp794xx
Tero Kristo [Fri, 23 Oct 2015 06:29:57 +0000 (09:29 +0300)] 
rtc: ds1307: Fix alarm programming for mcp794xx

mcp794xx alarm registers must be written in BCD format. However, the
alarm programming logic neglected this by adding one to the value
after bin2bcd conversion has been already done, writing bad values
to month register in case the alarm being set is in October. In this
case, the alarm month value becomes 0x0a instead of the expected 0x10.

Fix by moving the +1 addition within the bin2bcd call also.

Fixes: 1d1945d261a2 ("drivers/rtc/rtc-ds1307.c: add alarm support for mcp7941x chips")
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: isl12057: enable support for the standard "wakeup-source" property
Sudeep Holla [Wed, 21 Oct 2015 10:10:01 +0000 (11:10 +0100)] 
rtc: isl12057: enable support for the standard "wakeup-source" property

Though the isl12057 rtc driver should and will continue to support the
legacy "isil,irq2-can-wakeup-machine" property to enable RTC as the
wakeup source, we need to add support for the new standard property
"wakeup-source".

This patch adds support for "wakeup-source" property in addition to the
existing "isil,irq2-can-wakeup-machine" property.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: opal: enable support for the stardard "wakeup-source" property
Sudeep Holla [Wed, 21 Oct 2015 10:10:00 +0000 (11:10 +0100)] 
rtc: opal: enable support for the stardard "wakeup-source" property

Though the opal rtc driver should and will continue to support the legacy
"has-tpo" property to enable RTC as the wakeup source, we need to add
support for the new standard property "wakeup-source"

This patch adds support for "wakeup-source" property in addition to the
existing "has-tpo" property.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: isl1208: Pass the IRQF_ONESHOT flag
Fabio Estevam [Mon, 19 Oct 2015 00:06:22 +0000 (22:06 -0200)] 
rtc: isl1208: Pass the IRQF_ONESHOT flag

Since commit 1c6c69525b40eb76de8adf039409722015927dc3 ("genirq: Reject
bogus threaded irq requests") threaded IRQs without a primary handler
need to be requested with IRQF_ONESHOT, otherwise the request will fail.

So pass the IRQF_ONESHOT flag in this case.

The semantic patch that makes this change is available
in scripts/coccinelle/misc/irqf_oneshot.cocci

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: pcf8563: add CLKOUT to common clock framework
Heiko Schocher [Fri, 16 Oct 2015 11:31:29 +0000 (13:31 +0200)] 
rtc: pcf8563: add CLKOUT to common clock framework

Add the clkout output clk to the common clock framework.
Disable the CLKOUT of the RTC after power-up.
After power-up/reset of the RTC, CLKOUT is enabled by default,
with CLKOUT enabled the RTC chip has 2-3 times higher power
consumption.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: davinci: remove incorrect reference to probe function
Arnd Bergmann [Mon, 12 Oct 2015 13:14:05 +0000 (15:14 +0200)] 
rtc: davinci: remove incorrect reference to probe function

The davinci rtc driver uses the module_platform_driver_probe()
helper to call the probe function and mark it as __init, but
it also puts a reference into its davinci_rtc_driver function.

This will crash if we ever get a deferred probe and the probe
function is called again after the init section has been removed.
kbuild warns about this:

WARNING: vmlinux.o(.data+0x1aa2b4): Section mismatch in reference from the variable davinci_rtc_driver to the function .init.text:davinci_rtc_probe()
The variable davinci_rtc_driver references
the function __init davinci_rtc_probe()

This patch removes the .probe callback from the platform driver,
which avoids those problems.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: at91rm9200: clear RTC alarm status flag prior to suspending
Wenyou Yang [Mon, 12 Oct 2015 08:39:23 +0000 (16:39 +0800)] 
rtc: at91rm9200: clear RTC alarm status flag prior to suspending

As said in the SAMA5D2 datasheet, "Prior to instructing the device
to enter ULP mode 1, ... and the internal sources of wake-up must
be cleared."

This patch is to clear the RTC alarm status flag prior to suspending
to avoid the erroneous wake-up activity, as it is often used as
the wake-up source for the ULP mode 1.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: pcf2127: remove useless driver version
Uwe Kleine-König [Fri, 2 Oct 2015 09:17:20 +0000 (11:17 +0200)] 
rtc: pcf2127: remove useless driver version

A driver version is only really sensible for oot drivers. Also the
dev_info about having found a chip only signals that allocating the
driver data succeeded and so isn't worth much.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: pcf2127: fix reading uninitialized value on RTC_READ_VL ioctl
Uwe Kleine-König [Fri, 2 Oct 2015 09:17:19 +0000 (11:17 +0200)] 
rtc: pcf2127: fix reading uninitialized value on RTC_READ_VL ioctl

The flag reported on the RTC_READ_VL ioctl is only initialized when the
date is read out. So the voltage low value doesn't represent reality but
the status at the time the date was read (or 0 if the date was not read
yet).

Moreover when userspace requests a value via an ioctl there is no added
benefit to also make a prosa representation of this (and other) values
appear in the kernel log so remove the calls to dev_info and the driver
data members to track their state.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: stmp3xxx: unify register access macros
Harald Geyer [Fri, 2 Oct 2015 20:18:01 +0000 (20:18 +0000)] 
rtc: stmp3xxx: unify register access macros

Use STMP_OFFSET_REG_(SET|CLR) instead of defining _SET and _CLR for
STMP3XXX_RTC_CTRL and STMP3XXX_RTC_PERSISTENT0 - no functional changes.

Signed-off-by: Harald Geyer <harald@ccbib.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: da9063: GPL copyright inconsistency fix
Steve Twiss [Fri, 2 Oct 2015 10:21:11 +0000 (11:21 +0100)] 
rtc: da9063: GPL copyright inconsistency fix

Fix misleading and inconsistent copyright header wording.

Alter the copyright header text and MODULE_LICENSE macro to ensure the
GPL v2 licence description is correctly represented.

It will remove the incorrectly LGPL worded text. Words such as "Library"
from the line "GNU Library General Public License"; and replace the word
"library" with "program" in several other places.

The copyright should match the GPL v2 description as specified in the GNU
license found here: http://www.gnu.org/licenses/gpl-2.0.html

It should also match this copyright text with the correct MODULE_LICENSE
macro text as found in the kernel: include/linux/module.h
In this case "GNU Public License v2 or later" is linked with "GPL".

Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: pcf85063: return an error when date is invalid
Alexandre Belloni [Tue, 29 Sep 2015 21:02:46 +0000 (23:02 +0200)] 
rtc: pcf85063: return an error when date is invalid

Return an error when the date is invalid as the policy should be
implemented there.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: rx8025: remove unnecessary braces
Alexandre Belloni [Sat, 26 Sep 2015 14:25:28 +0000 (16:25 +0200)] 
rtc: rx8025: remove unnecessary braces

braces {} are not necessary for single statement blocks

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: ds1343: remove misuse of IRQF_NO_SUSPEND flag
Sudeep Holla [Mon, 21 Sep 2015 15:47:02 +0000 (16:47 +0100)] 
rtc: ds1343: remove misuse of IRQF_NO_SUSPEND flag

The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
be left enabled so as to allow them to work as expected during the
suspend-resume cycle, but doesn't guarantee that it will wake the system
from a suspended state, enable_irq_wake is recommended to be used for
the wakeup.

This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: ab8500: remove misuse of IRQF_NO_SUSPEND flag
Sudeep Holla [Mon, 21 Sep 2015 15:46:58 +0000 (16:46 +0100)] 
rtc: ab8500: remove misuse of IRQF_NO_SUSPEND flag

The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
be left enabled so as to allow them to work as expected during the
suspend-resume cycle, but doesn't guarantee that it will wake the system
from a suspended state, enable_irq_wake is recommended to be used for
the wakeup.

This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: pl031: remove misuse of IRQF_NO_SUSPEND flag
Sudeep Holla [Mon, 21 Sep 2015 15:46:57 +0000 (16:46 +0100)] 
rtc: pl031: remove misuse of IRQF_NO_SUSPEND flag

The IRQF_NO_SUSPEND flag is used to identify the interrupts that should
be left enabled so as to allow them to work as expected during the
suspend-resume cycle, but doesn't guarantee that it will wake the system
from a suspended state, enable_irq_wake is recommended to be used for
the wakeup.

This patch removes the use of IRQF_NO_SUSPEND flags and uses newly
introduce PM wakeup APIs dev_pm_{set,clear}_wake_irq.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: opal: fix type of token
Andrzej Hajda [Mon, 21 Sep 2015 13:33:56 +0000 (15:33 +0200)] 
rtc: opal: fix type of token

The variable can take signed values.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: ds1390: Add trickle charger device tree binding
Ivan Grimaldi [Fri, 18 Sep 2015 15:27:57 +0000 (17:27 +0200)] 
rtc: ds1390: Add trickle charger device tree binding

Introduce a device tree binding for specifying the trickle charger
configuration for ds1390.

Signed-off-by: Ivan Grimaldi <grimaldi.ivan@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agortc: ds1390: fix ds1390_get_reg return value
Ivan Grimaldi [Fri, 18 Sep 2015 15:27:56 +0000 (17:27 +0200)] 
rtc: ds1390: fix ds1390_get_reg return value

spi_write_then_read puts in rx_buf the received data starting from
the first byte of the rx_buf

Signed-off-by: Ivan Grimaldi <grimaldi.ivan@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
8 years agoarm64: fixup for mm renames
Andrew Morton [Sun, 8 Nov 2015 00:06:59 +0000 (16:06 -0800)] 
arm64: fixup for mm renames

__GFP_WAIT was renamed for __GFP_RECLAIM and the gfpflags_allow_blocking()
helper was added.

Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 7 Nov 2015 22:32:45 +0000 (14:32 -0800)] 
Merge branch 'akpm' (patches from Andrew)

Merge second patch-bomb from Andrew Morton:

 - most of the rest of MM

 - procfs

 - lib/ updates

 - printk updates

 - bitops infrastructure tweaks

 - checkpatch updates

 - nilfs2 update

 - signals

 - various other misc bits: coredump, seqfile, kexec, pidns, zlib, ipc,
   dma-debug, dma-mapping, ...

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (102 commits)
  ipc,msg: drop dst nil validation in copy_msg
  include/linux/zutil.h: fix usage example of zlib_adler32()
  panic: release stale console lock to always get the logbuf printed out
  dma-debug: check nents in dma_sync_sg*
  dma-mapping: tidy up dma_parms default handling
  pidns: fix set/getpriority and ioprio_set/get in PRIO_USER mode
  kexec: use file name as the output message prefix
  fs, seqfile: always allow oom killer
  seq_file: reuse string_escape_str()
  fs/seq_file: use seq_* helpers in seq_hex_dump()
  coredump: change zap_threads() and zap_process() to use for_each_thread()
  coredump: ensure all coredumping tasks have SIGNAL_GROUP_COREDUMP
  signal: remove jffs2_garbage_collect_thread()->allow_signal(SIGCONT)
  signal: introduce kernel_signal_stop() to fix jffs2_garbage_collect_thread()
  signal: turn dequeue_signal_lock() into kernel_dequeue_signal()
  signals: kill block_all_signals() and unblock_all_signals()
  nilfs2: fix gcc uninitialized-variable warnings in powerpc build
  nilfs2: fix gcc unused-but-set-variable warnings
  MAINTAINERS: nilfs2: add header file for tracing
  nilfs2: add tracepoints for analyzing reading and writing metadata files
  ...

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sat, 7 Nov 2015 21:33:07 +0000 (13:33 -0800)] 
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma updates from Doug Ledford:
 "This is my initial round of 4.4 merge window patches.  There are a few
  other things I wish to get in for 4.4 that aren't in this pull, as
  this represents what has gone through merge/build/run testing and not
  what is the last few items for which testing is not yet complete.

   - "Checksum offload support in user space" enablement
   - Misc cxgb4 fixes, add T6 support
   - Misc usnic fixes
   - 32 bit build warning fixes
   - Misc ocrdma fixes
   - Multicast loopback prevention extension
   - Extend the GID cache to store and return attributes of GIDs
   - Misc iSER updates
   - iSER clustering update
   - Network NameSpace support for rdma CM
   - Work Request cleanup series
   - New Memory Registration API"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (76 commits)
  IB/core, cma: Make __attribute_const__ declarations sparse-friendly
  IB/core: Remove old fast registration API
  IB/ipath: Remove fast registration from the code
  IB/hfi1: Remove fast registration from the code
  RDMA/nes: Remove old FRWR API
  IB/qib: Remove old FRWR API
  iw_cxgb4: Remove old FRWR API
  RDMA/cxgb3: Remove old FRWR API
  RDMA/ocrdma: Remove old FRWR API
  IB/mlx4: Remove old FRWR API support
  IB/mlx5: Remove old FRWR API support
  IB/srp: Dont allocate a page vector when using fast_reg
  IB/srp: Remove srp_finish_mapping
  IB/srp: Convert to new registration API
  IB/srp: Split srp_map_sg
  RDS/IW: Convert to new memory registration API
  svcrdma: Port to new memory registration API
  xprtrdma: Port to new memory registration API
  iser-target: Port to new memory registration API
  IB/iser: Port to new fast registration API
  ...

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Linus Torvalds [Sat, 7 Nov 2015 21:05:44 +0000 (13:05 -0800)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/trivial

Pull trivial updates from Jiri Kosina:
 "Trivial stuff from trivial tree that can be trivially summed up as:

   - treewide drop of spurious unlikely() before IS_ERR() from Viresh
     Kumar

   - cosmetic fixes (that don't really affect basic functionality of the
     driver) for pktcdvd and bcache, from Julia Lawall and Petr Mladek

   - various comment / printk fixes and updates all over the place"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  bcache: Really show state of work pending bit
  hwmon: applesmc: fix comment typos
  Kconfig: remove comment about scsi_wait_scan module
  class_find_device: fix reference to argument "match"
  debugfs: document that debugfs_remove*() accepts NULL and error values
  net: Drop unlikely before IS_ERR(_OR_NULL)
  mm: Drop unlikely before IS_ERR(_OR_NULL)
  fs: Drop unlikely before IS_ERR(_OR_NULL)
  drivers: net: Drop unlikely before IS_ERR(_OR_NULL)
  drivers: misc: Drop unlikely before IS_ERR(_OR_NULL)
  UBI: Update comments to reflect UBI_METAONLY flag
  pktcdvd: drop null test before destroy functions

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Linus Torvalds [Sat, 7 Nov 2015 20:49:27 +0000 (12:49 -0800)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid

Pull HID updates from Jiri Kosina:
 "Highlights:

   - Intel Skylake Win8 precision touchpads support fixes/improvements
     from Mika Westerberg

   - Lenovo Yoga 2 quirk from Ritesh Raj Sarraf

   - potential uninitialized buffer access fix in HID core from Richard
     Purdie

   - Wacom Intuos and Wacom Cintiq 2 support improvements from Jason
     Gerecke and Ping Cheng

   - initiation of sysfs deprecation process for most of the roccat
     drivers, from the roccat support maintiner Stefan Achatz

   - quite a few device ID / quirk additions and small fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (30 commits)
  HID: logitech: Add support for G29
  HID: logitech: Simplify wheel detection scheme
  HID: wacom: Call 'wacom_query_tablet_data' only after 'hid_hw_start'
  HID: wacom: Fix ABS_MISC reporting for Cintiq Companion 2
  HID: wacom: Remove useless conditions from 'wacom_query_tablet_data'
  HID: wacom: fix Intuos wireless report id issue
  HID: fix some indenting issues
  HID: wacom: Expect 'touch_max' touches if HID_DG_CONTACTCOUNT not present
  HID: wacom: Tie cached HID_DG_CONTACTCOUNT indices to report ID
  HID: roccat: Fixed resubmit: Deprecating most Roccat sysfs attributes
  HID: wacom: Report full pressure range for Intuos, Cintiq 13HD Touch
  HID: wacom: Add support for Cintiq Companion 2
  HID: multitouch: Fetch feature reports on demand for Win8 devices
  HID: sensor-hub: Add quirk for Lenovo Yoga 2 with ITE Chips
  HID: usbhid: Fix for the WiiU adapter from Mayflash
  HID: corsair: boolify struct k90_led.removed
  HID: corsair: Add Corsair Vengeance K90 driver
  HID: hid-input: allow input_configured callback return errors
  HID: multitouch: Add suffix for HID_DG_TOUCHPAD
  HID: i2c-hid: Fill in physical device providing HID functionality
  ...

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livep...
Linus Torvalds [Sat, 7 Nov 2015 20:15:17 +0000 (12:15 -0800)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/livepatching

Pull livepatching fix from Jiri Kosina:
 "A fix for a kernel oops in case CONFIG_DEBUG_SET_MODULE_RONX is unset
  (as in such case it's possible for module struct to share a page with
  executable text, which is currently not being handled with grace) from
  Josh Poimboeuf"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
  livepatch: Fix crash with !CONFIG_DEBUG_SET_MODULE_RONX

8 years agodwc_eth_qos: Delete an unnecessary check before the function call "of_node_put"
Markus Elfring [Sat, 7 Nov 2015 15:30:34 +0000 (16:30 +0100)] 
dwc_eth_qos: Delete an unnecessary check before the function call "of_node_put"

The of_node_put() function tests whether its argument is NULL
and then returns immediately.
Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobonding: fix panic on non-ARPHRD_ETHER enslave failure
Jay Vosburgh [Sat, 7 Nov 2015 01:23:23 +0000 (17:23 -0800)] 
bonding: fix panic on non-ARPHRD_ETHER enslave failure

Since commit 7d5cd2ce529b, when bond_enslave fails on devices that
are not ARPHRD_ETHER, if needed, it resets the bonding device back to
ARPHRD_ETHER by calling ether_setup.

Unfortunately, ether_setup clobbers dev->flags, clearing IFF_UP
if the bond device is up, leaving it in a quasi-down state without
having actually gone through dev_close.  For bonding, if any periodic
work queue items are active (miimon, arp_interval, etc), those will
remain running, as they are stopped by bond_close.  At this point, if
the bonding module is unloaded or the bond is deleted, the system will
panic when the work function is called.

This panic is resolved by calling dev_close on the bond itself
prior to calling ether_setup.

Cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Fixes: 7d5cd2ce5292 ("bonding: correctly handle bonding type change on enslave failure")
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/qlcnic: fix mac address restore in bond mode 5/6
Jarod Wilson [Fri, 6 Nov 2015 14:25:31 +0000 (09:25 -0500)] 
net/qlcnic: fix mac address restore in bond mode 5/6

The bonding driver saves a copy of slaves' original mac address and then
assigns whatever mac as needed to the slave, depending on mode. In at
least modes 5 and 6 (balance-tlb, balance-alb), it often ends up being the
mac address of another slave. On release from the bond, the original mac
address is supposed to get restored via a dev_set_mac_address() call in
the bonding driver's __bond_release_one() function, which calls the
slave's ndo_set_mac_address function, which for qlcnic, is
qlcnic_set_mac().

Now, this function tries to be somewhat intelligent and exit early if
you're trying to set the mac address to the same thing that is already
set. The problem here is that adapter->mac_addr isn't in sync with
netdev->dev_addr. The qlcnic driver still has the original mac stored in
adapter->mac_addr, while the bonding driver has updated netdev->dev_addr,
so qlcnic thinks we're trying to set the same address it already has.

I think the way to go here, since the function updates both netdev and
adapter's stored mac addresses, is to check if either of them doesn't
match the newly requested mac. Simply checking netdev's value only could
result in a similar mismatch and non-update, so look at both.

CC: Dept-GELinuxNICDev@qlogic.com
CC: netdev@vger.kernel.org
CC: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agofjes: Delete an unnecessary check before the function call "vfree"
Markus Elfring [Fri, 6 Nov 2015 08:30:29 +0000 (09:30 +0100)] 
fjes: Delete an unnecessary check before the function call "vfree"

The vfree() function performs also input parameter validation.
Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodirectio: add block polling support
Jens Axboe [Tue, 27 Oct 2015 05:09:51 +0000 (14:09 +0900)] 
directio: add block polling support

This adds support for sync O_DIRECT read/write poll support.

Signed-off-by: Jens Axboe <axboe@fb.com>
[hch: split from a larger patch, minor updates]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
8 years agoNVMe: add blk polling support
Jens Axboe [Wed, 4 Nov 2015 03:37:26 +0000 (20:37 -0700)] 
NVMe: add blk polling support

Add nvme_poll(), which will check a specific completion queue for
command completions. Wire that up to the new block layer poll
mechanism.

Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
8 years agoblock: add block polling support
Jens Axboe [Thu, 5 Nov 2015 17:44:55 +0000 (10:44 -0700)] 
block: add block polling support

Add basic support for polling for specific IO to complete. This uses
the cookie that blk-mq passes back, which enables the block layer
to pass this cookie to the driver to spin for a specific request.

This will be combined with request latency tracking, so we can make
qualified decisions about when to poll and when not to. For now, for
benchmark purposes, we add a sysfs file that controls whether polling
is enabled or not.

Signed-off-by: Jens Axboe <axboe@fb.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
8 years agoblk-mq: return tag/queue combo in the make_request_fn handlers
Jens Axboe [Thu, 5 Nov 2015 17:41:40 +0000 (10:41 -0700)] 
blk-mq: return tag/queue combo in the make_request_fn handlers

Return a cookie, blk_qc_t, from the blk-mq make request functions, that
allows a later caller to uniquely identify a specific IO. The cookie
doesn't mean anything to the caller, but the caller can use it to later
pass back to the block layer. The block layer can then identify the
hardware queue and request from that cookie.

Signed-off-by: Jens Axboe <axboe@fb.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
8 years agoblock: change ->make_request_fn() and users to return a queue cookie
Jens Axboe [Thu, 5 Nov 2015 17:41:16 +0000 (10:41 -0700)] 
block: change ->make_request_fn() and users to return a queue cookie

No functional changes in this patch, but it prepares us for returning
a more useful cookie related to the IO that was queued up.

Signed-off-by: Jens Axboe <axboe@fb.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
8 years agoubifs: introduce UBIFS_ATIME_SUPPORT to ubifs
Dongsheng Yang [Sat, 7 Nov 2015 04:46:11 +0000 (12:46 +0800)] 
ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs

To make ubifs support atime flexily, this commit introduces
a Kconfig option named as UBIFS_ATIME_SUPPORT.

With UBIFS_ATIME_SUPPORT=n:
ubifs keeps the full compatibility to no_atime from
the start of ubifs.

=================UBIFS_ATIME_SUPPORT=n=======================
-o - no atime
-o atime - no atime
-o noatime - no atime
-o relatime - no atime
-o strictatime - no atime
-o lazyatime - no atime

With UBIFS_ATIME_SUPPORT=y:
ubifs supports the atime same with other main stream
file systems.
=================UBIFS_ATIME_SUPPORT=y=======================
-o - default behavior (relatime currently)
-o atime - atime support
-o noatime - no atime support
-o relatime - relative atime support
-o strictatime - strict atime support
-o lazyatime - lazy atime support

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
8 years agoubifs: make ubifs_[get|set]xattr atomic
Dongsheng Yang [Tue, 18 Aug 2015 04:38:36 +0000 (12:38 +0800)] 
ubifs: make ubifs_[get|set]xattr atomic

This commit make the ubifs_[get|set]xattr protected by ui_mutex.

Originally, there is a possibility that ubifs_getxattr to get
a wrong value.

  P1                                  P2
----------                   ----------
ubifs_getxattr                      ubifs_setxattr
- kfree()
- memcpy()
- kmemdup()

Then ubifs_getxattr() would get a non-sense data. To solve this
problem, this commit make the xattr of ubifs_inode updated in
atomic.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
8 years agoMerge tag 'drm-intel-next-fixes-2015-11-06' of git://anongit.freedesktop.org/drm...
Dave Airlie [Sat, 7 Nov 2015 07:16:59 +0000 (17:16 +1000)] 
Merge tag 'drm-intel-next-fixes-2015-11-06' of git://anongit.freedesktop.org/drm-intel into drm-next

Here's a handful of i915 fixes for drm-next/v4.4. Imre's commit alone
should address the remaining warnings galore you experienced on
Skylake. Almost all of the rest are also fixes against user or QA
reported bugs, with references.

* tag 'drm-intel-next-fixes-2015-11-06' of git://anongit.freedesktop.org/drm-intel:
  drm/i915/skl: disable display side power well support for now
  drm/i915: Extend DSL readout fix to BDW and SKL.
  drm/i915: Do graphics device reset under forcewake
  drm/i915: Skip fence installation for objects with rotated views (v4)
  drm/i915: add quirk to enable backlight on Dell Chromebook 11 (2015)
  drm/i915/skl: Prevent unclaimed register writes on skylake.
  drm/i915: disable CPU PWM also on LPT/SPT backlight disable
  drm/i915: Fix maxfifo watermark calc on vlv cursor planes
  drm/i915: add hotplug activation period to hotplug update mask

8 years agoMerge branch 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux into drm...
Dave Airlie [Sat, 7 Nov 2015 07:16:29 +0000 (17:16 +1000)] 
Merge branch 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux into drm-next

One is fix for a regression in 4.3, One irq locking rework.

* 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux:
  drm/vmwgfx: Relax irq locking somewhat
  drm/vmwgfx: Properly flush cursor updates and page-flips

8 years agoipc,msg: drop dst nil validation in copy_msg
Davidlohr Bueso [Sat, 7 Nov 2015 00:33:04 +0000 (16:33 -0800)] 
ipc,msg: drop dst nil validation in copy_msg

d0edd8528362 ("ipc: convert invalid scenarios to use WARN_ON") relaxed the
nil dst parameter check, originally being a full BUG_ON.  However, this
check seems quite unnecessary when the only purpose is for
ceckpoint/restore (MSG_COPY flag):

o The copy variable is set initially to nil, apparently as a way of
  ensuring that prepare_copy is previously called.  Which is in fact done,
  unconditionally at the beginning of do_msgrcv.

o There is no concurrency with 'copy' (stack allocated in do_msgrcv).

Furthermore, any errors in 'copy' (and thus prepare_copy/copy_msg) should
always handled by IS_ERR() family.  Therefore remove this check altogether
as it can never occur with the current users.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoinclude/linux/zutil.h: fix usage example of zlib_adler32()
Anish Bhatt [Sat, 7 Nov 2015 00:33:01 +0000 (16:33 -0800)] 
include/linux/zutil.h: fix usage example of zlib_adler32()

alder32 was renamed to zlib_adler32 since before 2.6.11.

Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agopanic: release stale console lock to always get the logbuf printed out
Vitaly Kuznetsov [Sat, 7 Nov 2015 00:32:58 +0000 (16:32 -0800)] 
panic: release stale console lock to always get the logbuf printed out

In some cases we may end up killing the CPU holding the console lock
while still having valuable data in logbuf. E.g. I'm observing the
following:

- A crash is happening on one CPU and console_unlock() is being called on
  some other.

- console_unlock() tries to print out the buffer before releasing the lock
  and on slow console it takes time.

- in the meanwhile crashing CPU does lots of printk()-s with valuable data
  (which go to the logbuf) and sends IPIs to all other CPUs.

- console_unlock() finishes printing previous chunk and enables interrupts
  before trying to print out the rest, the CPU catches the IPI and never
  releases console lock.

This is not the only possible case: in VT/fb subsystems we have many other
console_lock()/console_unlock() users.  Non-masked interrupts (or
receiving NMI in case of extreme slowness) will have the same result.
Getting the whole console buffer printed out on crash should be top
priority.

[akpm@linux-foundation.org: tweak comment text]
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Baoquan He <bhe@redhat.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Xie XiuQi <xiexiuqi@huawei.com>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agodma-debug: check nents in dma_sync_sg*
Robin Murphy [Sat, 7 Nov 2015 00:32:55 +0000 (16:32 -0800)] 
dma-debug: check nents in dma_sync_sg*

Like dma_unmap_sg, dma_sync_sg* should be called with the original number
of entries passed to dma_map_sg, so do the same check in the sync path as
we do in the unmap path.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agodma-mapping: tidy up dma_parms default handling
Robin Murphy [Sat, 7 Nov 2015 00:32:51 +0000 (16:32 -0800)] 
dma-mapping: tidy up dma_parms default handling

Many DMA controllers and other devices set max_segment_size to
indicate their scatter-gather capability, but have no interest in
segment_boundary_mask. However, the existence of a dma_parms structure
precludes the use of any default value, leaving them as zeros (assuming
a properly kzalloc'ed structure). If a well-behaved IOMMU (or SWIOTLB)
then tries to respect this by ensuring a mapped segment does not cross
a zero-byte boundary, hilarity ensues.

Since zero is a nonsensical value for either parameter, treat it as an
indicator for "default", as might be expected. In the process, clean up
a bit by replacing the bare constants with slightly more meaningful
macros and removing the superfluous "else" statements.

[akpm@linux-foundation.org: dma-mapping.h needs sizes.h for SZ_64K]
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agopidns: fix set/getpriority and ioprio_set/get in PRIO_USER mode
Ben Segall [Sat, 7 Nov 2015 00:32:48 +0000 (16:32 -0800)] 
pidns: fix set/getpriority and ioprio_set/get in PRIO_USER mode

setpriority(PRIO_USER, 0, x) will change the priority of tasks outside of
the current pid namespace.  This is in contrast to both the other modes of
setpriority and the example of kill(-1).  Fix this.  getpriority and
ioprio have the same failure mode, fix them too.

Eric said:

: After some more thinking about it this patch sounds justifiable.
:
: My goal with namespaces is not to build perfect isolation mechanisms
: as that can get into ill defined territory, but to build well defined
: mechanisms.  And to handle the corner cases so you can use only
: a single namespace with well defined results.
:
: In this case you have found the two interfaces I am aware of that
: identify processes by uid instead of by pid.  Which quite frankly is
: weird.  Unfortunately the weird unexpected cases are hard to handle
: in the usual way.
:
: I was hoping for a little more information.  Changes like this one we
: have to be careful of because someone might be depending on the current
: behavior.  I don't think they are and I do think this make sense as part
: of the pid namespace.

Signed-off-by: Ben Segall <bsegall@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Ambrose Feinstein <ambrose@google.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agokexec: use file name as the output message prefix
Minfei Huang [Sat, 7 Nov 2015 00:32:45 +0000 (16:32 -0800)] 
kexec: use file name as the output message prefix

kexec output message misses the prefix "kexec", when Dave Young split the
kexec code.  Now, we use file name as the output message prefix.

Currently, the format of output message:
[  140.290795] SYSC_kexec_load: hello, world
[  140.291534] kexec: sanity_check_segment_list: hello, world

Ideally, the format of output message:
[   30.791503] kexec: SYSC_kexec_load, Hello, world
[   79.182752] kexec_core: sanity_check_segment_list, Hello, world

Remove the custom prefix "kexec" in output message.

Signed-off-by: Minfei Huang <mnfhuang@gmail.com>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agofs, seqfile: always allow oom killer
Greg Thelen [Sat, 7 Nov 2015 00:32:42 +0000 (16:32 -0800)] 
fs, seqfile: always allow oom killer

Since 5cec38ac866b ("fs, seq_file: fallback to vmalloc instead of oom kill
processes") seq_buf_alloc() avoids calling the oom killer for PAGE_SIZE or
smaller allocations; but larger allocations can use the oom killer via
vmalloc().  Thus reads of small files can return ENOMEM, but larger files
use the oom killer to avoid ENOMEM.

The effect of this bug is that reads from /proc and other virtual
filesystems can return ENOMEM instead of the preferred behavior - oom
killing something (possibly the calling process).  I don't know of anyone
except Google who has noticed the issue.

I suspect the fix is more needed in smaller systems where there isn't any
reclaimable memory.  But these seem like the kinds of systems which
probably don't use the oom killer for production situations.

Memory overcommit requires use of the oom killer to select a victim
regardless of file size.

Enable oom killer for small seq_buf_alloc() allocations.

Fixes: 5cec38ac866b ("fs, seq_file: fallback to vmalloc instead of oom kill processes")
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoseq_file: reuse string_escape_str()
Andy Shevchenko [Sat, 7 Nov 2015 00:32:40 +0000 (16:32 -0800)] 
seq_file: reuse string_escape_str()

strint_escape_str() escapes input string by given criteria.  In case of
seq_escape() the criteria is to convert some characters to their octal
representation.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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