File: /usr/src/linux/arch/i386/kernel/init_task.c

1     #include <linux/mm.h>
2     #include <linux/sched.h>
3     #include <linux/init.h>
4     
5     #include <asm/uaccess.h>
6     #include <asm/pgtable.h>
7     #include <asm/desc.h>
8     
9     static struct fs_struct init_fs = INIT_FS;
10     static struct files_struct init_files = INIT_FILES;
11     static struct signal_struct init_signals = INIT_SIGNALS;
12     struct mm_struct init_mm = INIT_MM(init_mm);
13     
14     /*
15      * Initial task structure.
16      *
17      * We need to make sure that this is 8192-byte aligned due to the
18      * way process stacks are handled. This is done by having a special
19      * "init_task" linker map entry..
20      */
21     union task_union init_task_union 
22     	__attribute__((__section__(".data.init_task"))) =
23     		{ INIT_TASK(init_task_union.task) };
24     
25     /*
26      * per-CPU TSS segments. Threads are completely 'soft' on Linux,
27      * no more per-task TSS's. The TSS size is kept cacheline-aligned
28      * so they are allowed to end up in the .data.cacheline_aligned
29      * section. Since TSS's are completely CPU-local, we want them
30      * on exact cacheline boundaries, to eliminate cacheline ping-pong.
31      */ 
32     struct tss_struct init_tss[NR_CPUS] __cacheline_aligned = { [0 ... NR_CPUS-1] = INIT_TSS };
33     
34