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| author | Yonghong Song <yhs@fb.com> | 2018-05-24 11:21:08 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-05-24 18:18:19 -0700 |
| commit | f8d959a5b188dc81e57a6bac34a1b2986f61e2fd (patch) | |
| tree | 3171bc6566cb8f6077f333953338d1d1d8faac95 /kernel/events | |
| parent | 31ad39239f089ef93bb51f9918618f18f45c78d9 (diff) | |
| download | op-kernel-dev-f8d959a5b188dc81e57a6bac34a1b2986f61e2fd.zip op-kernel-dev-f8d959a5b188dc81e57a6bac34a1b2986f61e2fd.tar.gz | |
perf/core: add perf_get_event() to return perf_event given a struct file
A new extern function, perf_get_event(), is added to return a perf event
given a struct file. This function will be used in later patches.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 67612ce..6eeab86 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -11212,6 +11212,14 @@ struct file *perf_event_get(unsigned int fd) return file; } +const struct perf_event *perf_get_event(struct file *file) +{ + if (file->f_op != &perf_fops) + return ERR_PTR(-EINVAL); + + return file->private_data; +} + const struct perf_event_attr *perf_event_attrs(struct perf_event *event) { if (!event) |
