linux-kernel - [tip:perf/core] perf: Add const qualifier to perf_pmu

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Message-ID: <tip-03d8e80beb7db78a13c192431205b9c83f7e0cd1@git.kernel.org>
Date:	Wed, 19 Jun 2013 11:38:49 -0700
From:	tip-bot for Mischa Jonker <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Mischa.Jonker@...opsys.com,
	hpa@...or.com, mingo@...nel.org, mjonker@...opsys.com,
	peterz@...radead.org, tglx@...utronix.de
Subject: [tip:perf/core] perf: Add const qualifier to perf_pmu_register's 
 'name' arg

Commit-ID:  03d8e80beb7db78a13c192431205b9c83f7e0cd1
Gitweb:     http://git.kernel.org/tip/03d8e80beb7db78a13c192431205b9c83f7e0cd1
Author:     Mischa Jonker <Mischa.Jonker@...opsys.com>
AuthorDate: Tue, 4 Jun 2013 11:45:48 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 19 Jun 2013 12:50:23 +0200

perf: Add const qualifier to perf_pmu_register's 'name' arg

This allows us to use pdev->name for registering a PMU device.
IMO the name is not supposed to be changed anyway.

Signed-off-by: Mischa Jonker <mjonker@...opsys.com>
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/1370339148-5566-1-git-send-email-mjonker@synopsys.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/metag/kernel/perf/perf_event.c | 2 +-
 include/linux/perf_event.h          | 4 ++--
 kernel/events/core.c                | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c
index 3665694..5b18888 100644
--- a/arch/metag/kernel/perf/perf_event.c
+++ b/arch/metag/kernel/perf/perf_event.c
@@ -882,7 +882,7 @@ static int __init init_hw_perf_events(void)
 	}
 
 	register_cpu_notifier(&metag_pmu_notifier);
-	ret = perf_pmu_register(&pmu, (char *)metag_pmu->name, PERF_TYPE_RAW);
+	ret = perf_pmu_register(&pmu, metag_pmu->name, PERF_TYPE_RAW);
 out:
 	return ret;
 }
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 74a4e14..4bc57d0 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -188,7 +188,7 @@ struct pmu {
 
 	struct device			*dev;
 	const struct attribute_group	**attr_groups;
-	char				*name;
+	const char			*name;
 	int				type;
 
 	int * __percpu			pmu_disable_count;
@@ -519,7 +519,7 @@ struct perf_output_handle {
 
 #ifdef CONFIG_PERF_EVENTS
 
-extern int perf_pmu_register(struct pmu *pmu, char *name, int type);
+extern int perf_pmu_register(struct pmu *pmu, const char *name, int type);
 extern void perf_pmu_unregister(struct pmu *pmu);
 
 extern int perf_num_counters(void);
diff --git a/kernel/events/core.c b/kernel/events/core.c
index aca95bc..9c89207 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6179,7 +6179,7 @@ free_dev:
 static struct lock_class_key cpuctx_mutex;
 static struct lock_class_key cpuctx_lock;
 
-int perf_pmu_register(struct pmu *pmu, char *name, int type)
+int perf_pmu_register(struct pmu *pmu, const char *name, int type)
 {
 	int cpu, ret;
 
--
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