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