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sched: define and use CPU_PRI_* enums for cpu notifier priorities
Instead of hardcoding priority 10 and 20 in sched and perf, collect them into CPU_PRI_* enums. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
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3975d16760
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3 changed files with 11 additions and 2 deletions
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@ -48,6 +48,15 @@ extern ssize_t arch_cpu_release(const char *, size_t);
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#endif
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struct notifier_block;
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/*
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* CPU notifier priorities.
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*/
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enum {
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/* migration should happen before other stuff but after perf */
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CPU_PRI_PERF = 20,
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CPU_PRI_MIGRATION = 10,
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};
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#ifdef CONFIG_SMP
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/* Need to know about CPUs going up/down? */
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#if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE)
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@ -1068,7 +1068,7 @@ static inline void perf_event_disable(struct perf_event *event) { }
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#define perf_cpu_notifier(fn) \
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do { \
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static struct notifier_block fn##_nb __cpuinitdata = \
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{ .notifier_call = fn, .priority = 20 }; \
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{ .notifier_call = fn, .priority = CPU_PRI_PERF }; \
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fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \
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(void *)(unsigned long)smp_processor_id()); \
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fn(&fn##_nb, (unsigned long)CPU_STARTING, \
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@ -5801,7 +5801,7 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
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*/
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static struct notifier_block __cpuinitdata migration_notifier = {
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.notifier_call = migration_call,
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.priority = 10
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.priority = CPU_PRI_MIGRATION,
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};
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static int __init migration_init(void)
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