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perf/x86: Make dummy_iregs static

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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
This commit is contained in:
Peter Zijlstra 2020-10-30 12:15:06 +01:00
parent 76a4efa809
commit e506d1dac0
1 changed files with 1 additions and 1 deletions
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2
arch/x86/events/intel/ds.c
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@ -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) {
/*