arch/um/kernel/init_task.c

   1 /*
   2  * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include "linux/config.h"
   7 #include "linux/mm.h"
   8 #include "linux/module.h"
   9 #include "linux/sched.h"
  10 #include "linux/init_task.h"
  11 #include "linux/mqueue.h"
  12 #include "asm/uaccess.h"
  13 #include "asm/pgtable.h"
  14 #include "user_util.h"
  15 #include "mem_user.h"
  16 #include "os.h"
  17
  18 static struct fs_struct init_fs = INIT_FS;
  19 struct mm_struct init_mm = INIT_MM(init_mm);
  20 static struct files_struct init_files = INIT_FILES;
  21 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
  22 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
  23 EXPORT_SYMBOL(init_mm);
  24
  25 /*
  26  * Initial task structure.
  27  *
  28  * All other task structs will be allocated on slabs in fork.c
  29  */
  30
  31 struct task_struct init_task = INIT_TASK(init_task);
  32
  33 EXPORT_SYMBOL(init_task);
  34
  35 /*
  36  * Initial thread structure.
  37  *
  38  * We need to make sure that this is 16384-byte aligned due to the
  39  * way process stacks are handled. This is done by having a special
  40  * "init_task" linker map entry..
  41  */
  42
  43 union thread_union init_thread_union
  44 __attribute__((__section__(".data.init_task"))) =
  45 { INIT_THREAD_INFO(init_task) };
  46
  47 void unprotect_stack(unsigned long stack)
  48 {
  49         os_protect_memory((void *) stack, (1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE,
  50                        1, 1, 0);
  51 }
  52
  53 /*
  54  * Overrides for Emacs so that we follow Linus's tabbing style.
  55  * Emacs will notice this stuff at the end of the file and automatically
  56  * adjust the settings for this buffer only.  This must remain at the end
  57  * of the file.
  58  * ---------------------------------------------------------------------------
  59  * Local variables:
  60  * c-file-style: "linux"
  61  * End:
  62  */