From 7778887880d278c23dc0975210df0381c878ae1e Mon Sep 17 00:00:00 2001 From: Hiroshi Shimamoto Date: Fri, 19 Oct 2007 20:35:02 +0200 Subject: x86: merge init_task_32/64.c Merge init_task_32/64.c. Move 64bit per cpu data orig_ist to setup64.c. [ mingo: fixed checkpatch trivialities. ] Signed-off-by: Hiroshi Shimamoto Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/init_task.c | 47 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 arch/x86/kernel/init_task.c (limited to 'arch/x86/kernel/init_task.c') diff --git a/arch/x86/kernel/init_task.c b/arch/x86/kernel/init_task.c new file mode 100644 index 00000000000..468c9c43784 --- /dev/null +++ b/arch/x86/kernel/init_task.c @@ -0,0 +1,47 @@ +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +static struct fs_struct init_fs = INIT_FS; +static struct files_struct init_files = INIT_FILES; +static struct signal_struct init_signals = INIT_SIGNALS(init_signals); +static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); +struct mm_struct init_mm = INIT_MM(init_mm); +EXPORT_SYMBOL(init_mm); + +/* + * Initial thread structure. + * + * We need to make sure that this is THREAD_SIZE aligned due to the + * way process stacks are handled. This is done by having a special + * "init_task" linker map entry.. + */ +union thread_union init_thread_union + __attribute__((__section__(".data.init_task"))) = + { INIT_THREAD_INFO(init_task) }; + +/* + * Initial task structure. + * + * All other task structs will be allocated on slabs in fork.c + */ +struct task_struct init_task = INIT_TASK(init_task); +EXPORT_SYMBOL(init_task); + +/* + * per-CPU TSS segments. Threads are completely 'soft' on Linux, + * no more per-task TSS's. The TSS size is kept cacheline-aligned + * so they are allowed to end up in the .data.cacheline_aligned + * section. Since TSS's are completely CPU-local, we want them + * on exact cacheline boundaries, to eliminate cacheline ping-pong. + */ +DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS; + -- cgit v1.2.3