1 #include <linux/mm.h> 2 #include <linux/sched.h> 3 #include <linux/init.h> 4 #include <linux/config.h> 5 6 #include <asm/uaccess.h> 7 #include <asm/pgtable.h> 8 #include <asm/desc.h> 9 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; 34 35 36 #define ALIGN_TO_4K __attribute__((section(".data.init_task"))) 37 38 pgd_t boot_vmalloc_pgt[512] ALIGN_TO_4K; 39