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| author | Ingo Molnar <mingo@elte.hu> | 2009-05-04 19:13:30 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-04 19:30:32 +0200 |
| commit | 0d905bca23aca5c86a10ee101bcd3b1abbd40b25 (patch) | |
| tree | 5a4e6b956d1923ac1d28ae8b8f3034c1c90df5a5 /include/linux/perf_counter.h | |
| parent | ba77813a2a22d631fe5bc0bf1ec0d11350544b70 (diff) | |
| download | blackbird-op-linux-0d905bca23aca5c86a10ee101bcd3b1abbd40b25.tar.gz blackbird-op-linux-0d905bca23aca5c86a10ee101bcd3b1abbd40b25.zip | |
perf_counter: initialize the per-cpu context earlier
percpu scheduling for perfcounters wants to take the context lock,
but that lock first needs to be initialized. Currently it is an
early_initcall() - but that is too late, the task tick runs much
sooner than that.
Call it explicitly from the scheduler init sequence instead.
[ Impact: fix access-before-init crash ]
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_counter.h')
| -rw-r--r-- | include/linux/perf_counter.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index f776851f8c4b..a356fa69796c 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -573,6 +573,8 @@ extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); extern int sysctl_perf_counter_priv; +extern void perf_counter_init(void); + #else static inline void perf_counter_task_sched_in(struct task_struct *task, int cpu) { } @@ -600,9 +602,10 @@ perf_counter_mmap(unsigned long addr, unsigned long len, static inline void perf_counter_munmap(unsigned long addr, unsigned long len, - unsigned long pgoff, struct file *file) { } + unsigned long pgoff, struct file *file) { } static inline void perf_counter_comm(struct task_struct *tsk) { } +static inline void perf_counter_init(void) { } #endif #endif /* __KERNEL__ */ |
