arch/um/kernel/init_task.c

   1 /*
   2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,intel.linux}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include "linux/mm.h"
   7 #include "linux/module.h"
   8 #include "linux/sched.h"
   9 #include "linux/init_task.h"
  10 #include "linux/mqueue.h"
  11 #include "asm/uaccess.h"
  12 #include "asm/pgtable.h"
  13 #include "mem_user.h"
  14 #include "os.h"
  15
  16 static struct fs_struct init_fs = INIT_FS;
  17 struct mm_struct init_mm = INIT_MM(init_mm);
  18 static struct files_struct init_files = INIT_FILES;
  19 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
  20 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
  21 EXPORT_SYMBOL(init_mm);
  22
  23 /*
  24  * Initial task structure.
  25  *
  26  * All other task structs will be allocated on slabs in fork.c
  27  */
  28
  29 struct task_struct init_task = INIT_TASK(init_task);
  30
  31 EXPORT_SYMBOL(init_task);
  32
  33 /*
  34  * Initial thread structure.
  35  *
  36  * We need to make sure that this is aligned due to the
  37  * way process stacks are handled. This is done by having a special
  38  * "init_task" linker map entry..
  39  */
  40
  41 union thread_union init_thread_union
  42         __attribute__((__section__(".data.init_task"))) =
  43                 { INIT_THREAD_INFO(init_task) };
  44
  45 union thread_union cpu0_irqstack
  46         __attribute__((__section__(".data.init_irqstack"))) =
  47                 { INIT_THREAD_INFO(init_task) };
  48
  49 void unprotect_stack(unsigned long stack)
  50 {
  51         os_protect_memory((void *) stack, THREAD_SIZE, 1, 1, 0);
  52 }