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| author | Avi Kivity <avi@redhat.com> | 2011-06-29 18:42:35 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-07-01 11:06:38 +0200 |
| commit | 4dc0da86967d5463708631d02a70cfed5b104884 (patch) | |
| tree | e09071a62f2457b710ff69df3be1bff39340a4c6 /drivers/oprofile | |
| parent | 89d6c0b5bdbb1927775584dcf532d98b3efe1477 (diff) | |
| download | linux-4dc0da86967d5463708631d02a70cfed5b104884.tar.gz linux-4dc0da86967d5463708631d02a70cfed5b104884.tar.bz2 linux-4dc0da86967d5463708631d02a70cfed5b104884.zip | |
perf: Add context field to perf_event
The perf_event overflow handler does not receive any caller-derived
argument, so many callers need to resort to looking up the perf_event
in their local data structure. This is ugly and doesn't scale if a
single callback services many perf_events.
Fix by adding a context parameter to perf_event_create_kernel_counter()
(and derived hardware breakpoints APIs) and storing it in the perf_event.
The field can be accessed from the callback as event->overflow_handler_context.
All callers are updated.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1309362157-6596-2-git-send-email-avi@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/oprofile')
| -rw-r--r-- | drivers/oprofile/oprofile_perf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/oprofile/oprofile_perf.c b/drivers/oprofile/oprofile_perf.c index 9046f7b2ed79..59acf9ef78a4 100644 --- a/drivers/oprofile/oprofile_perf.c +++ b/drivers/oprofile/oprofile_perf.c @@ -79,7 +79,7 @@ static int op_create_counter(int cpu, int event) pevent = perf_event_create_kernel_counter(&counter_config[event].attr, cpu, NULL, - op_overflow_handler); + op_overflow_handler, NULL); if (IS_ERR(pevent)) return PTR_ERR(pevent); |