Commit-ID: 9e46294dadedc0c04adcb8ce760bd2cd74f7332d Gitweb: http://git.kernel.org/tip/9e46294dadedc0c04adcb8ce760bd2cd74f7332d Author: Frederic Weisbecker <fweisbec@xxxxxxxxx> AuthorDate: Sat, 2 Jul 2011 15:00:52 +0200 Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx> CommitDate: Sat, 2 Jul 2011 18:04:03 +0200 x86: Save stack pointer in perf live regs savings In order to prepare for fetching the stack pointer from the regs when possible in dump_trace() instead of taking the local one, save the current stack pointer in perf live regs saving. Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- arch/x86/include/asm/perf_event.h | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index d9d4dae..094fb30 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -152,6 +152,11 @@ extern unsigned long perf_misc_flags(struct pt_regs *regs); (regs)->bp = caller_frame_pointer(); \ (regs)->cs = __KERNEL_CS; \ regs->flags = 0; \ + asm volatile( \ + _ASM_MOV "%%"_ASM_SP ", %0\n" \ + : "=m" ((regs)->sp) \ + :: "memory" \ + ); \ } #else -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|