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| author | Robert Richter <robert.richter@amd.com> | 2012-07-25 19:12:45 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-09-13 16:59:48 +0200 |
| commit | bad9ac2d7f878a31cf1ae8c1ee3768077d222bcb (patch) | |
| tree | 26f49a2e0824a6e6a7830e12faaeaf201b16d99b /include | |
| parent | 35534b201c9f115c68962c095b5a9aad204d025f (diff) | |
| download | linux-bad9ac2d7f878a31cf1ae8c1ee3768077d222bcb.tar.gz | |
perf/x86/ibs: Check syscall attribute flags
Current implementation simply ignores attribute flags. Thus, there is no notification to userland of unsupported features. Check syscall's attribute flags to let userland know if a feature is supported by the kernel. This is also needed to distinguish between future kernels what might support a feature. Cc: <stable@vger.kernel.org> v3.5.. 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/20120910093018.GO8285@erda.amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/perf_event.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 33ed9d605f91..bdb41612bfec 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -274,6 +274,8 @@ struct perf_event_attr { __u64 branch_sample_type; /* enum branch_sample_type */ }; +#define perf_flags(attr) (*(&(attr)->read_format + 1)) + /* * Ioctls that can be done on a perf event fd: */ |