summaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
authorPeter Zijlstra <a.p.zijlstra@chello.nl>2010-03-05 13:01:18 +0100
committerIngo Molnar <mingo@elte.hu>2010-03-10 13:22:24 +0100
commit3f6da3905398826d85731247e7fbcf53400c18bd (patch)
tree3e01248974385999fb8e7f8d5daa53b46228f649 /include
parentdc1d628a67a8f042e711ea5accc0beedc3ef0092 (diff)
downloadop-kernel-dev-3f6da3905398826d85731247e7fbcf53400c18bd.zip
op-kernel-dev-3f6da3905398826d85731247e7fbcf53400c18bd.tar.gz
perf: Rework and fix the arch CPU-hotplug hooks
Remove the hw_perf_event_*() hotplug hooks in favour of per PMU hotplug notifiers. This has the advantage of reducing the static weak interface as well as exposing all hotplug actions to the PMU. Use this to fix x86 hotplug usage where we did things in ONLINE which should have been done in UP_PREPARE or STARTING. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mundt <lethal@linux-sh.org> Cc: paulus@samba.org Cc: eranian@google.com Cc: robert.richter@amd.com Cc: fweisbec@gmail.com Cc: Arnaldo Carvalho de Melo <acme@infradead.org> LKML-Reference: <20100305154128.736225361@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/perf_event.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 6f8cd7d..80acbf3 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -936,5 +936,21 @@ static inline void perf_event_disable(struct perf_event *event) { }
#define perf_output_put(handle, x) \
perf_output_copy((handle), &(x), sizeof(x))
+/*
+ * This has to have a higher priority than migration_notifier in sched.c.
+ */
+#define perf_cpu_notifier(fn) \
+do { \
+ static struct notifier_block fn##_nb __cpuinitdata = \
+ { .notifier_call = fn, .priority = 20 }; \
+ fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \
+ (void *)(unsigned long)smp_processor_id()); \
+ fn(&fn##_nb, (unsigned long)CPU_STARTING, \
+ (void *)(unsigned long)smp_processor_id()); \
+ fn(&fn##_nb, (unsigned long)CPU_ONLINE, \
+ (void *)(unsigned long)smp_processor_id()); \
+ register_cpu_notifier(&fn##_nb); \
+} while (0)
+
#endif /* __KERNEL__ */
#endif /* _LINUX_PERF_EVENT_H */
OpenPOWER on IntegriCloud