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authorYonghong Song <yhs@fb.com>2018-05-24 11:21:08 -0700
committerAlexei Starovoitov <ast@kernel.org>2018-05-24 18:18:19 -0700
commitf8d959a5b188dc81e57a6bac34a1b2986f61e2fd (patch)
tree3171bc6566cb8f6077f333953338d1d1d8faac95 /kernel/events
parent31ad39239f089ef93bb51f9918618f18f45c78d9 (diff)
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.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 67612ce359ad..6eeab86d24ba 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)