[PATCH] perf: Fix build warning

[Lin Ming]

Fixes build warning introduced by the callchain rework

arch/x86/kernel/cpu/perf_event.c:1574: warning: âperf_callchain_entry_nmiâ defined but not used

Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
---
 arch/x86/kernel/cpu/perf_event.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index acc52af..bcddac6 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1571,9 +1571,6 @@ const struct pmu *hw_perf_event_init(struct perf_event *event)
  * callchain support
  */
 
-static DEFINE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry_nmi);
-
-
 static void
 backtrace_warning_symbol(void *data, char *msg, unsigned long symbol)
 {


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