x86: Use generic init_task

[deliverable/linux.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 3ad653de7100014100f91705f5dfb820bf433152..224695938400f042ae379d07f7c9a3e56ca70153 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -69,7 +69,6 @@ config X86
        select HAVE_ARCH_JUMP_LABEL
        select HAVE_TEXT_POKE_SMP
        select HAVE_GENERIC_HARDIRQS
-       select HAVE_SPARSE_IRQ
        select SPARSE_IRQ
        select GENERIC_FIND_FIRST_BIT
        select GENERIC_IRQ_PROBE
@@ -83,6 +82,8 @@ config X86
        select ARCH_HAVE_NMI_SAFE_CMPXCHG
        select GENERIC_IOMAP
        select DCACHE_WORD_ACCESS if !DEBUG_PAGEALLOC
+       select GENERIC_SMP_IDLE_THREAD
+       select HAVE_GENERIC_INIT_TASK
 
 config INSTRUCTION_DECODER
        def_bool (KPROBES || PERF_EVENTS)
@@ -2164,9 +2165,9 @@ config IA32_EMULATION
        depends on X86_64
        select COMPAT_BINFMT_ELF
        ---help---
-         Include code to run 32-bit programs under a 64-bit kernel. You should
-         likely turn this on, unless you're 100% sure that you don't have any
-         32-bit programs left.
+         Include code to run legacy 32-bit programs under a
+         64-bit kernel. You should likely turn this on, unless you're
+         100% sure that you don't have any 32-bit programs left.
 
 config IA32_AOUT
        tristate "IA32 a.out support"
@@ -2174,9 +2175,23 @@ config IA32_AOUT
        ---help---
          Support old a.out binaries in the 32bit emulation.
 
+config X86_X32
+       bool "x32 ABI for 64-bit mode (EXPERIMENTAL)"
+       depends on X86_64 && IA32_EMULATION && EXPERIMENTAL
+       ---help---
+         Include code to run binaries for the x32 native 32-bit ABI
+         for 64-bit processors.  An x32 process gets access to the
+         full 64-bit register file and wide data path while leaving
+         pointers at 32 bits for smaller memory footprint.
+
+         You will need a recent binutils (2.22 or later) with
+         elf32_x86_64 support enabled to compile a kernel with this
+         option set.
+
 config COMPAT
        def_bool y
-       depends on IA32_EMULATION
+       depends on IA32_EMULATION || X86_X32
+       select ARCH_WANT_OLD_COMPAT_IPC
 
 config COMPAT_FOR_U64_ALIGNMENT
        def_bool COMPAT