Use ®s->sp instead of regs for getting the top of stack in kernel mode. (on x86-64, regs->sp always points the top of stack)
[ impact: Oprofile decodes only stack for backtracing on i386 ] Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Harvey Harrison <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jan Blunck <[email protected]> --- arch/x86/include/asm/ptrace.h | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h index 5cdd19f..90b76b3 100644 --- a/arch/x86/include/asm/ptrace.h +++ b/arch/x86/include/asm/ptrace.h @@ -187,14 +187,14 @@ static inline int v8086_mode(struct pt_regs *regs) /* * X86_32 CPUs don't save ss and esp if the CPU is already in kernel mode - * when it traps. So regs will be the current sp. + * when it traps. So ®s->sp will be the current sp. * * This is valid only for kernel mode traps. */ static inline unsigned long kernel_trap_sp(struct pt_regs *regs) { #ifdef CONFIG_X86_32 - return (unsigned long)regs; + return (unsigned long)®s->sp; #else return regs->sp; #endif -- Masami Hiramatsu Software Engineer Hitachi Computer Products (America) Inc. Software Solutions Division e-mail: [email protected] -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
