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/arch/x86_64/kernel/init_task.c

https://bitbucket.org/evzijst/gittest
C | 49 lines | 23 code | 7 blank | 19 comment | 0 complexity | 9cfed2b951b8e8465509dc24c4e43e53 MD5 | raw file
 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 files_struct init_files = INIT_FILES;
15static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
16static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
17struct mm_struct init_mm = INIT_MM(init_mm);
18
19EXPORT_SYMBOL(init_mm);
20
21/*
22 * Initial task structure.
23 *
24 * We need to make sure that this is 8192-byte aligned due to the
25 * way process stacks are handled. This is done by having a special
26 * "init_task" linker map entry..
27 */
28union thread_union init_thread_union 
29	__attribute__((__section__(".data.init_task"))) =
30		{ INIT_THREAD_INFO(init_task) };
31
32/*
33 * Initial task structure.
34 *
35 * All other task structs will be allocated on slabs in fork.c
36 */
37struct task_struct init_task = INIT_TASK(init_task);
38
39EXPORT_SYMBOL(init_task);
40/*
41 * per-CPU TSS segments. Threads are completely 'soft' on Linux,
42 * no more per-task TSS's. The TSS size is kept cacheline-aligned
43 * so they are allowed to end up in the .data.cacheline_aligned
44 * section. Since TSS's are completely CPU-local, we want them
45 * on exact cacheline boundaries, to eliminate cacheline ping-pong.
46 */ 
47DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_maxaligned_in_smp;
48
49#define ALIGN_TO_4K __attribute__((section(".data.init_task")))