LXR linux/arch/x86/kernel/init

   1#include <linux/mm.h>
   2#include <linux/module.h>
   3#include <linux/sched.h>
   4#include <linux/init.h>
   5#include <linux/init_task.h>
   6#include <linux/fs.h>
   7#include <linux/mqueue.h>
   8
   9#include <asm/uaccess.h>
  10#include <asm/pgtable.h>
  11#include <asm/desc.h>
  12
  13static struct fs_struct init_fs = INIT_FS;
  14static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
  15static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
  16struct mm_struct init_mm = INIT_MM(init_mm);
  17EXPORT_UNUSED_SYMBOL(init_mm); /* will be removed in 2.6.26 */
  18
  19/*
  20 * Initial thread structure.
  21 *
  22 * We need to make sure that this is THREAD_SIZE aligned due to the
  23 * way process stacks are handled. This is done by having a special
  24 * "init_task" linker map entry..
  25 */
  26union thread_union init_thread_union
  27        __attribute__((__section__(".data.init_task"))) =
  28                { INIT_THREAD_INFO(init_task) };
  29
  30/*
  31 * Initial task structure.
  32 *
  33 * All other task structs will be allocated on slabs in fork.c
  34 */
  35struct task_struct init_task = INIT_TASK(init_task);
  36EXPORT_SYMBOL(init_task);
  37
  38/*
  39 * per-CPU TSS segments. Threads are completely 'soft' on Linux,
  40 * no more per-task TSS's. The TSS size is kept cacheline-aligned
  41 * so they are allowed to end up in the .data.cacheline_aligned
  42 * section. Since TSS's are completely CPU-local, we want them
  43 * on exact cacheline boundaries, to eliminate cacheline ping-pong.
  44 */
  45DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;
  46
  47