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authorPeter Zijlstra <peterz@infradead.org>2020-10-30 12:15:06 +0100
committerPeter Zijlstra <peterz@infradead.org>2020-11-09 18:12:35 +0100
commite506d1dac0edb2df82f2aa0582e814f9cd9aa07d (patch)
tree73b80f8166e06db89e768ca9e99729e8ec1d1139
parentperf/arch: Remove perf_sample_data::regs_user_copy (diff)
downloadlinux-e506d1dac0edb2df82f2aa0582e814f9cd9aa07d.tar.xz
linux-e506d1dac0edb2df82f2aa0582e814f9cd9aa07d.zip
perf/x86: Make dummy_iregs static
Having pt_regs on-stack is unfortunate, it's 168 bytes. Since it isn't actually used, make it a static variable. This both gets if off the stack and ensures it gets 0 initialized, just in case someone does look at it. Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201030151955.324273677@infradead.org
-rw-r--r--arch/x86/events/intel/ds.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 276b29da732f..b47cc4226934 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -1738,7 +1738,7 @@ __intel_pmu_pebs_event(struct perf_event *event,
struct x86_perf_regs perf_regs;
struct pt_regs *regs = &perf_regs.regs;
void *at = get_next_pebs_record_by_bit(base, top, bit);
- struct pt_regs dummy_iregs;
+ static struct pt_regs dummy_iregs;
if (hwc->flags & PERF_X86_EVENT_AUTO_RELOAD) {
/*