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/fs.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 "mem_user.h"
  15 #include "os.h"
  16
  17 static struct fs_struct init_fs = INIT_FS;
  18 struct mm_struct init_mm = INIT_MM(init_mm);
  19 static struct files_struct init_files = INIT_FILES;
  20 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
  21 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
  22 EXPORT_SYMBOL(init_mm);
  23
  24 /*
  25  * Initial task structure.
  26  *
  27  * All other task structs will be allocated on slabs in fork.c
  28  */
  29
  30 struct task_struct init_task = INIT_TASK(init_task);
  31
  32 EXPORT_SYMBOL(init_task);
  33
  34 /*
  35  * Initial thread structure.
  36  *
  37  * We need to make sure that this is aligned due to the
  38  * way process stacks are handled. This is done by having a special
  39  * "init_task" linker map entry..
  40  */
  41
  42 union thread_union init_thread_union
  43         __attribute__((__section__(".data.init_task"))) =
  44                 { INIT_THREAD_INFO(init_task) };
  45
  46 union thread_union cpu0_irqstack
  47         __attribute__((__section__(".data.init_irqstack"))) =
  48                 { INIT_THREAD_INFO(init_task) };
  49
  50 void unprotect_stack(unsigned long stack)
  51 {
  52         os_protect_memory((void *) stack, THREAD_SIZE, 1, 1, 0);
  53 }