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| author | Peter Zijlstra <peterz@infradead.org> | 2016-01-11 15:00:50 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-01-21 18:54:24 +0100 |
| commit | fae3fde65138b6071b1b0e0b567d4058a8b6a88c (patch) | |
| tree | a99a98df4999f5a07dae0333c5c0545dd980d0a0 /kernel/events/hw_breakpoint.c | |
| parent | perf: Specialize perf_event_exit_task() (diff) | |
| download | linux-fae3fde65138b6071b1b0e0b567d4058a8b6a88c.tar.xz linux-fae3fde65138b6071b1b0e0b567d4058a8b6a88c.zip | |
perf: Collapse and fix event_function_call() users
There is one common bug left in all the event_function_call() users,
between loading ctx->task and getting to the remote_function(),
ctx->task can already have been changed.
Therefore we need to double check and retry if ctx->task != current.
Insert another trampoline specific to event_function_call() that
checks for this and further validates state. This also allows getting
rid of the active/inactive functions.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events/hw_breakpoint.c')
| -rw-r--r-- | kernel/events/hw_breakpoint.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c index 92ce5f4ccc26..3f8cb1e14588 100644 --- a/kernel/events/hw_breakpoint.c +++ b/kernel/events/hw_breakpoint.c @@ -444,7 +444,7 @@ int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *att * current task. */ if (irqs_disabled() && bp->ctx && bp->ctx->task == current) - __perf_event_disable(bp); + perf_event_disable_local(bp); else perf_event_disable(bp); |