diff options
| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-25 09:16:12 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-25 09:16:12 -0700 |
| commit | 889e5528cbe7dff2e91caf48f4bb23c17748b984 (patch) | |
| tree | af66c15b48efb49926c475bbb4f33f48e1a76c40 /kernel/events/core.c | |
| parent | Merge 3.5-rc3 into usb-next (diff) | |
| parent | Linux 3.5-rc4 (diff) | |
| download | linux-dev-889e5528cbe7dff2e91caf48f4bb23c17748b984.tar.xz linux-dev-889e5528cbe7dff2e91caf48f4bb23c17748b984.zip | |
Merge 3.5-rc4 into usb-next
This is to get the USB fixes that were merged in the 3.5-rc4 tree into usb-next
so that everyone can sync up properly.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/events/core.c')
| -rw-r--r-- | kernel/events/core.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index f85c0154b333..d7d71d6ec972 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -253,9 +253,9 @@ perf_cgroup_match(struct perf_event *event) return !event->cgrp || event->cgrp == cpuctx->cgrp; } -static inline void perf_get_cgroup(struct perf_event *event) +static inline bool perf_tryget_cgroup(struct perf_event *event) { - css_get(&event->cgrp->css); + return css_tryget(&event->cgrp->css); } static inline void perf_put_cgroup(struct perf_event *event) @@ -484,7 +484,11 @@ static inline int perf_cgroup_connect(int fd, struct perf_event *event, event->cgrp = cgrp; /* must be done before we fput() the file */ - perf_get_cgroup(event); + if (!perf_tryget_cgroup(event)) { + event->cgrp = NULL; + ret = -ENOENT; + goto out; + } /* * all events in a group must monitor |