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/i386/Makefile | 2 +- arch/x86/kernel/Makefile_32 | 2 +- arch/x86/kernel/Makefile_64 | 2 +- arch/x86/kernel/init_task.c | 47 ++++++++++++++++++++++++++++++++++++ arch/x86/kernel/init_task_32.c | 46 ----------------------------------- arch/x86/kernel/init_task_64.c | 54 ------------------------------------------ arch/x86/kernel/setup64.c | 6 +++++ arch/x86_64/Makefile | 2 +- 8 files changed, 57 insertions(+), 104 deletions(-) create mode 100644 arch/x86/kernel/init_task.c delete mode 100644 arch/x86/kernel/init_task_32.c delete mode 100644 arch/x86/kernel/init_task_64.c diff --git a/arch/i386/Makefile b/arch/i386/Makefile index d82f11de60c..b88e47ca303 100644 --- a/arch/i386/Makefile +++ b/arch/i386/Makefile @@ -102,7 +102,7 @@ core-$(CONFIG_XEN) += arch/x86/xen/ # default subarch .h files mflags-y += -Iinclude/asm-x86/mach-default -head-y := arch/x86/kernel/head_32.o arch/x86/kernel/init_task_32.o +head-y := arch/x86/kernel/head_32.o arch/x86/kernel/init_task.o libs-y += arch/x86/lib/ core-y += arch/x86/kernel/ \ diff --git a/arch/x86/kernel/Makefile_32 b/arch/x86/kernel/Makefile_32 index a3fa11f8f46..69990f0ba86 100644 --- a/arch/x86/kernel/Makefile_32 +++ b/arch/x86/kernel/Makefile_32 @@ -2,7 +2,7 @@ # Makefile for the linux kernel. # -extra-y := head_32.o init_task_32.o vmlinux.lds +extra-y := head_32.o init_task.o vmlinux.lds obj-y := process_32.o signal_32.o entry_32.o traps_32.o irq_32.o \ ptrace_32.o time_32.o ioport_32.o ldt_32.o setup_32.o i8259_32.o sys_i386_32.o \ diff --git a/arch/x86/kernel/Makefile_64 b/arch/x86/kernel/Makefile_64 index 43da66213a4..2fc3d3f2c27 100644 --- a/arch/x86/kernel/Makefile_64 +++ b/arch/x86/kernel/Makefile_64 @@ -2,7 +2,7 @@ # Makefile for the linux kernel. # -extra-y := head_64.o head64.o init_task_64.o vmlinux.lds +extra-y := head_64.o head64.o init_task.o vmlinux.lds EXTRA_AFLAGS := -traditional obj-y := process_64.o signal_64.o entry_64.o traps_64.o irq_64.o \ ptrace_64.o time_64.o ioport_64.o ldt_64.o setup_64.o i8259_64.o sys_x86_64.o \ 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; + diff --git a/arch/x86/kernel/init_task_32.c b/arch/x86/kernel/init_task_32.c deleted file mode 100644 index d26fc063a76..00000000000 --- a/arch/x86/kernel/init_task_32.c +++ /dev/null @@ -1,46 +0,0 @@ -#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. - */ -DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS; - diff --git a/arch/x86/kernel/init_task_64.c b/arch/x86/kernel/init_task_64.c deleted file mode 100644 index 4ff33d4f855..00000000000 --- a/arch/x86/kernel/init_task_64.c +++ /dev/null @@ -1,54 +0,0 @@ -#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 task structure. - * - * We need to make sure that this is 8192-byte 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; - -/* Copies of the original ist values from the tss are only accessed during - * debugging, no special alignment required. - */ -DEFINE_PER_CPU(struct orig_ist, orig_ist); - -#define ALIGN_TO_4K __attribute__((section(".data.init_task"))) diff --git a/arch/x86/kernel/setup64.c b/arch/x86/kernel/setup64.c index ba918823505..e11886e8d8c 100644 --- a/arch/x86/kernel/setup64.c +++ b/arch/x86/kernel/setup64.c @@ -184,6 +184,12 @@ void __cpuinit check_efer(void) unsigned long kernel_eflags; +/* + * Copies of the original ist values from the tss are only accessed during + * debugging, no special alignment required. + */ +DEFINE_PER_CPU(struct orig_ist, orig_ist); + /* * cpu_init() initializes state that is per-CPU. Some data is already * initialized (naturally) in the bootstrap process, such as the GDT diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile index f48d862397f..6d89ab762ff 100644 --- a/arch/x86_64/Makefile +++ b/arch/x86_64/Makefile @@ -74,7 +74,7 @@ KBUILD_CFLAGS += $(cflags-y) CFLAGS_KERNEL += $(cflags-kernel-y) KBUILD_AFLAGS += -m64 -head-y := arch/x86/kernel/head_64.o arch/x86/kernel/head64.o arch/x86/kernel/init_task_64.o +head-y := arch/x86/kernel/head_64.o arch/x86/kernel/head64.o arch/x86/kernel/init_task.o libs-y += arch/x86/lib/ core-y += arch/x86/kernel/ \ -- cgit v1.2.3