perf/x86/amd/core: Mark perf_nmi_window as __ro_after_init

[PATCH] perf/x86/amd/core: Mark perf_nmi_window as __ro_after_init

Len Bao posted 1 patch 1 day, 1 hour ago

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arch/x86/events/amd/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

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[PATCH] perf/x86/amd/core: Mark perf_nmi_window as __ro_after_init

Posted by Len Bao 1 day, 1 hour ago

The 'perf_nmi_window' variable is initialized only during the init phase
in the 'amd_core_pmu_init' function and never changed. So, mark it as
__ro_after_init.

Signed-off-by: Len Bao <len.bao@gmx.us>
---
 arch/x86/events/amd/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index 0c92ed5f4..23546f965 100644
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -16,7 +16,7 @@
 #include "../perf_event.h"
 
 static DEFINE_PER_CPU(unsigned long, perf_nmi_tstamp);
-static unsigned long perf_nmi_window;
+static unsigned long perf_nmi_window __ro_after_init;
 
 /* AMD Event 0xFFF: Merge.  Used with Large Increment per Cycle events */
 #define AMD_MERGE_EVENT ((0xFULL << 32) | 0xFFULL)
-- 
2.43.0