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 signal_struct init_signals = INIT_SIGNALS(init_signals);
  14static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
  15
  16/*
  17 * Initial thread structure.
  18 *
  19 * We need to make sure that this is THREAD_SIZE aligned due to the
  20 * way process stacks are handled. This is done by having a special
  21 * "init_task" linker map entry..
  22 */
  23union thread_union init_thread_union __init_task_data =
  24        { INIT_THREAD_INFO(init_task) };
  25
  26/*
  27 * Initial task structure.
  28 *
  29 * All other task structs will be allocated on slabs in fork.c
  30 */
  31struct task_struct init_task = INIT_TASK(init_task);
  32EXPORT_SYMBOL(init_task);
  33
  34/*
  35 * per-CPU TSS segments. Threads are completely 'soft' on Linux,
  36 * no more per-task TSS's. The TSS size is kept cacheline-aligned
  37 * so they are allowed to end up in the .data.cacheline_aligned
  38 * section. Since TSS's are completely CPU-local, we want them
  39 * on exact cacheline boundaries, to eliminate cacheline ping-pong.
  40 */
  41DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;
  42
  43