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Subject[PATCH 08/46] kernel: MOve prototype declaration to header file include/linux/perf_event.h
Add prototype declaration of function to header file
include/linux/perf_event.h because it is used by more than one file.

This eliminates the following warning in kernel/events/core.c:
kernel/events/core.c:3743:13: warning: no previous prototype for ‘arch_perf_update_userpage’ [-Wmissing-prototypes]

Signed-off-by: Rashika Kheria <>
Reviewed-by: Josh Triplett <>
include/linux/perf_event.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index e56b07f..b9e1673 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -526,6 +526,8 @@ struct perf_output_handle {
int page;

+void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now);

extern int perf_pmu_register(struct pmu *pmu, const char *name, int type);
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