[PATCH 51/58] x86: perf: Add prototype for arch_perf_update_userpage

[Josh Triplett]

arch/x86/kernel/cpu/perf_event.c defines a function
arch_perf_update_userpage, overriding a __weak stub for that function
defined in kernel/events/core.c.  Nothing currently prototypes that
function.  Add a prototype right before the definition, to satisfy gcc
(-Wmissing-prototypes) and Sparse (-Wdecl).

arch/x86/kernel/cpu/perf_event.c:1692:6: warning: no previous prototype for âarch_perf_update_userpageâ [-Wmissing-prototypes]

Signed-off-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
---
 arch/x86/kernel/cpu/perf_event.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 4a3374e..2d070cb 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1689,6 +1689,8 @@ static struct pmu pmu = {
 	.flush_branch_stack	= x86_pmu_flush_branch_stack,
 };
 
+void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now);
+
 void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
 {
 	userpg->cap_usr_time = 0;
-- 
1.7.10.4

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