Messages in this thread Patch in this message | | | Date | Mon, 26 Aug 2013 20:44:43 +0000 | From | Christoph Lameter <> | Subject | [guv v2 01/31] x86: Use this_cpu_inc/dec for debug registers |
| |
I think this patch already exists in one form or another in some x86 tree.
Signed-off-by: Christoph Lameter <cl@linux.com>
Index: linux/arch/x86/include/asm/debugreg.h =================================================================== --- linux.orig/arch/x86/include/asm/debugreg.h 2013-08-06 13:52:23.740092873 -0500 +++ linux/arch/x86/include/asm/debugreg.h 2013-08-06 13:52:23.740092873 -0500 @@ -97,11 +97,11 @@ extern void hw_breakpoint_restore(void); DECLARE_PER_CPU(int, debug_stack_usage); static inline void debug_stack_usage_inc(void) { - __get_cpu_var(debug_stack_usage)++; + __this_cpu_inc(debug_stack_usage); } static inline void debug_stack_usage_dec(void) { - __get_cpu_var(debug_stack_usage)--; + __this_cpu_dec(debug_stack_usage); } int is_debug_stack(unsigned long addr); void debug_stack_set_zero(void); Index: linux/arch/x86/kernel/cpu/common.c =================================================================== --- linux.orig/arch/x86/kernel/cpu/common.c 2013-07-19 09:06:36.850047837 -0500 +++ linux/arch/x86/kernel/cpu/common.c 2013-08-06 13:54:36.426384889 -0500 @@ -1144,9 +1144,9 @@ DEFINE_PER_CPU(int, debug_stack_usage); int is_debug_stack(unsigned long addr) { - return __get_cpu_var(debug_stack_usage) || - (addr <= __get_cpu_var(debug_stack_addr) && - addr > (__get_cpu_var(debug_stack_addr) - DEBUG_STKSZ)); + return __this_cpu_read(debug_stack_usage) || + (addr <= __this_cpu_read(debug_stack_addr) && + addr > (__this_cpu_read(debug_stack_addr) - DEBUG_STKSZ)); } DEFINE_PER_CPU(u32, debug_idt_ctr);
| |