linux-kernel - [PATCH] kernel: events: core: Remove some unused functions

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Date:	Tue, 13 Jan 2015 19:31:26 +0100
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] kernel: events: core: Remove some unused functions

Removes some functions that are not used anywhere:
perf_cpu_hrtimer_cancel() perf_cgroup_event_cgrp_time()

This was partially found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 kernel/events/core.c |   33 ---------------------------------
 1 file changed, 33 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2b02c9f..6287095 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -695,11 +695,6 @@ static inline int is_cgroup_event(struct perf_event *event)
 	return 0;
 }
 
-static inline u64 perf_cgroup_event_cgrp_time(struct perf_event *event)
-{
-	return 0;
-}
-
 static inline void update_cgrp_time_from_event(struct perf_event *event)
 {
 }
@@ -789,34 +784,6 @@ static enum hrtimer_restart perf_cpu_hrtimer_handler(struct hrtimer *hr)
 	return ret;
 }
 
-/* CPU is going down */
-void perf_cpu_hrtimer_cancel(int cpu)
-{
-	struct perf_cpu_context *cpuctx;
-	struct pmu *pmu;
-	unsigned long flags;
-
-	if (WARN_ON(cpu != smp_processor_id()))
-		return;
-
-	local_irq_save(flags);
-
-	rcu_read_lock();
-
-	list_for_each_entry_rcu(pmu, &pmus, entry) {
-		cpuctx = this_cpu_ptr(pmu->pmu_cpu_context);
-
-		if (pmu->task_ctx_nr == perf_sw_context)
-			continue;
-
-		hrtimer_cancel(&cpuctx->hrtimer);
-	}
-
-	rcu_read_unlock();
-
-	local_irq_restore(flags);
-}
-
 static void __perf_cpu_hrtimer_init(struct perf_cpu_context *cpuctx, int cpu)
 {
 	struct hrtimer *hr = &cpuctx->hrtimer;
-- 
1.7.10.4

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