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| author |   Robert Richter <robert.richter@amd.com> | 2012-04-02 20:19:08 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2012-05-09 15:23:12 +0200 |
| commit | fd0d000b2c34aa43d4e92dcf0dfaeda7e123008a (patch) | |
| tree | 8b81831cf37f1be6dd3cc9be772952d5c835a550 /include/linux/perf_event.h | |
| parent | perf/x86-ibs: Fix update of period (diff) | |
| download | linux-dev-fd0d000b2c34aa43d4e92dcf0dfaeda7e123008a.tar.xz linux-dev-fd0d000b2c34aa43d4e92dcf0dfaeda7e123008a.zip | |
perf: Pass last sampling period to perf_sample_data_init()
We always need to pass the last sample period to
perf_sample_data_init(), otherwise the event distribution will be
wrong. Thus, modifiyng the function interface with the required period
as argument. So basically a pattern like this:
perf_sample_data_init(&data, ~0ULL);
data.period = event->hw.last_period;
will now be like that:
perf_sample_data_init(&data, ~0ULL, event->hw.last_period);
Avoids unininitialized data.period and simplifies code.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1333390758-10893-3-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index ddbb6a901f65..f32578634d9d 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1132,11 +1132,14 @@ struct perf_sample_data { struct perf_branch_stack *br_stack; }; -static inline void perf_sample_data_init(struct perf_sample_data *data, u64 addr) +static inline void perf_sample_data_init(struct perf_sample_data *data, + u64 addr, u64 period) { + /* remaining struct members initialized in perf_prepare_sample() */ data->addr = addr; data->raw = NULL; data->br_stack = NULL; + data->period = period; } extern void perf_output_sample(struct perf_output_handle *handle, |