diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-01-28 23:12:55 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-28 23:12:55 +0100 |
| commit | 6a385db5ce7f1fd2c68ec511e44587b67dab8fca (patch) | |
| tree | 9324c8ae6f7be54b9fdbd6b60f759292aa727b1f /arch/x86/include/asm/thread_info.h | |
| parent | 18e352e4a73465349711a9324767e1b2453383e2 (diff) | |
| parent | 4369f1fb7cd4cf777312f43e1cb9aa5504fc4125 (diff) | |
Merge branch 'core/percpu' into x86/core
Conflicts:
kernel/irq/handle.c
Diffstat (limited to 'arch/x86/include/asm/thread_info.h')
| -rw-r--r-- | arch/x86/include/asm/thread_info.h | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h index 98789647baa..b46f8ca007b 100644 --- a/arch/x86/include/asm/thread_info.h +++ b/arch/x86/include/asm/thread_info.h @@ -194,25 +194,21 @@ static inline struct thread_info *current_thread_info(void) #else /* X86_32 */ -#include <asm/pda.h> +#include <asm/percpu.h> +#define KERNEL_STACK_OFFSET (5*8) /* * macros/functions for gaining access to the thread information structure * preempt_count needs to be 1 initially, until the scheduler is functional. */ #ifndef __ASSEMBLY__ -static inline struct thread_info *current_thread_info(void) -{ - struct thread_info *ti; - ti = (void *)(read_pda(kernelstack) + PDA_STACKOFFSET - THREAD_SIZE); - return ti; -} +DECLARE_PER_CPU(unsigned long, kernel_stack); -/* do not use in interrupt context */ -static inline struct thread_info *stack_thread_info(void) +static inline struct thread_info *current_thread_info(void) { struct thread_info *ti; - asm("andq %%rsp,%0; " : "=r" (ti) : "0" (~(THREAD_SIZE - 1))); + ti = (void *)(percpu_read(kernel_stack) + + KERNEL_STACK_OFFSET - THREAD_SIZE); return ti; } @@ -220,8 +216,8 @@ static inline struct thread_info *stack_thread_info(void) /* how to get the thread information struct from ASM */ #define GET_THREAD_INFO(reg) \ - movq %gs:pda_kernelstack,reg ; \ - subq $(THREAD_SIZE-PDA_STACKOFFSET),reg + movq PER_CPU_VAR(kernel_stack),reg ; \ + subq $(THREAD_SIZE-KERNEL_STACK_OFFSET),reg #endif |