diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/time_32.c | 13 | ||||
| -rw-r--r-- | arch/x86/kernel/time_64.c | 8 |
2 files changed, 11 insertions, 10 deletions
diff --git a/arch/x86/kernel/time_32.c b/arch/x86/kernel/time_32.c index fd876cc7748..fda0c34da75 100644 --- a/arch/x86/kernel/time_32.c +++ b/arch/x86/kernel/time_32.c @@ -34,23 +34,22 @@ unsigned long profile_pc(struct pt_regs *regs) { unsigned long pc = instruction_pointer(regs); -#ifdef CONFIG_SMP if (!user_mode_vm(regs) && in_lock_functions(pc)) { #ifdef CONFIG_FRAME_POINTER return *(unsigned long *)(regs->bp + sizeof(long)); #else - unsigned long *sp = (unsigned long *)®s->sp; - - /* Return address is either directly at stack pointer - or above a saved flags. Eflags has bits 22-31 zero, - kernel addresses don't. */ + unsigned long *sp = (unsigned long *)regs->sp; + /* + * Return address is either directly at stack pointer + * or above a saved flags. Eflags has bits 22-31 zero, + * kernel addresses don't. + */ if (sp[0] >> 22) return sp[0]; if (sp[1] >> 22) return sp[1]; #endif } -#endif return pc; } EXPORT_SYMBOL(profile_pc); diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c index e59a40ebff1..fda0c34da75 100644 --- a/arch/x86/kernel/time_64.c +++ b/arch/x86/kernel/time_64.c @@ -34,14 +34,16 @@ unsigned long profile_pc(struct pt_regs *regs) { unsigned long pc = instruction_pointer(regs); - /* Assume the lock function has either no stack frame or a copy - of flags from PUSHF - Eflags always has bits 22 and up cleared unlike kernel addresses. */ if (!user_mode_vm(regs) && in_lock_functions(pc)) { #ifdef CONFIG_FRAME_POINTER return *(unsigned long *)(regs->bp + sizeof(long)); #else unsigned long *sp = (unsigned long *)regs->sp; + /* + * Return address is either directly at stack pointer + * or above a saved flags. Eflags has bits 22-31 zero, + * kernel addresses don't. + */ if (sp[0] >> 22) return sp[0]; if (sp[1] >> 22) |