From 7778887880d278c23dc0975210df0381c878ae1e Mon Sep 17 00:00:00 2001 From: Hiroshi Shimamoto Date: Fri, 19 Oct 2007 20:35:02 +0200 Subject: [PATCH] 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 +- .../kernel/{init_task_32.c => init_task.c} | 11 ++-- arch/x86/kernel/init_task_64.c | 54 ------------------- arch/x86/kernel/setup64.c | 6 +++ arch/x86_64/Makefile | 2 +- 7 files changed, 16 insertions(+), 63 deletions(-) rename arch/x86/kernel/{init_task_32.c => init_task.c} (79%) delete mode 100644 arch/x86/kernel/init_task_64.c diff --git a/arch/i386/Makefile b/arch/i386/Makefile index d82f11de60..b88e47ca30 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 a3fa11f8f4..69990f0ba8 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 43da66213a..2fc3d3f2c2 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_32.c b/arch/x86/kernel/init_task.c similarity index 79% rename from arch/x86/kernel/init_task_32.c rename to arch/x86/kernel/init_task.c index d26fc063a7..468c9c4378 100644 --- a/arch/x86/kernel/init_task_32.c +++ b/arch/x86/kernel/init_task.c @@ -15,7 +15,6 @@ 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); /* @@ -25,7 +24,7 @@ EXPORT_SYMBOL(init_mm); * way process stacks are handled. This is done by having a special * "init_task" linker map entry.. */ -union thread_union init_thread_union +union thread_union init_thread_union __attribute__((__section__(".data.init_task"))) = { INIT_THREAD_INFO(init_task) }; @@ -35,12 +34,14 @@ union thread_union init_thread_union * 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. - */ + * 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_64.c b/arch/x86/kernel/init_task_64.c deleted file mode 100644 index 4ff33d4f85..0000000000 --- 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 ba91882350..e11886e8d8 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 f48d862397..6d89ab762f 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/ \ -- 2.39.5