[PATCH 31/58] perf: cgroup: Drop unused perf_cgroup_switch stub

[Josh Triplett]

kernel/events/core.c defines a no-op stub of perf_cgroup_switch when
CONFIG_CGROUP_PERF=n.  However, nothing actually calls
perf_cgroup_switch outside of an #ifdef CONFIG_CGROUP_PERF.  So, drop
the stub.

This also eliminates a warning from gcc (-Wmissing-prototypes) and from
Sparse (-Wdecl).

kernel/events/core.c:604:1: warning: no previous prototype for âperf_cgroup_switchâ [-Wmissing-prototypes]

Signed-off-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
---
 kernel/events/core.c |    5 -----
 1 file changed, 5 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 01ba4db..543638a 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -600,11 +600,6 @@ perf_cgroup_set_timestamp(struct task_struct *task,
 {
 }
 
-void
-perf_cgroup_switch(struct task_struct *task, struct task_struct *next)
-{
-}
-
 static inline void
 perf_cgroup_set_shadow_time(struct perf_event *event, u64 now)
 {
-- 
1.7.10.4

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