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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 /samples | |
| 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 'samples')
| -rw-r--r-- | samples/hw_breakpoint/data_breakpoint.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/samples/hw_breakpoint/data_breakpoint.c b/samples/hw_breakpoint/data_breakpoint.c index 7b164d3200ff..ef7f32291852 100644 --- a/samples/hw_breakpoint/data_breakpoint.c +++ b/samples/hw_breakpoint/data_breakpoint.c @@ -60,7 +60,7 @@ static int __init hw_break_module_init(void) attr.bp_len = HW_BREAKPOINT_LEN_4; attr.bp_type = HW_BREAKPOINT_W | HW_BREAKPOINT_R; - sample_hbp = register_wide_hw_breakpoint(&attr, sample_hbp_handler); + sample_hbp = register_wide_hw_breakpoint(&attr, sample_hbp_handler, NULL); if (IS_ERR((void __force *)sample_hbp)) { ret = PTR_ERR((void __force *)sample_hbp); goto fail; |