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@synopsys.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1370339148-5566-1-git-send-email-mjonker@synopsys.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c
index 3665694..5b18888 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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;