diff options
| author | Con Kolivas <kernel@kolivas.org> | 2016-12-12 10:56:17 +1100 |
|---|---|---|
| committer | Con Kolivas <kernel@kolivas.org> | 2016-12-12 10:56:17 +1100 |
| commit | c3e1d5cbf048128fa788513fbc5fa3036c85fcb0 (patch) | |
| tree | 4b2b38cc960963abc48b2e30c6e2415ee383c98d /kernel/locking/rtmutex_common.h | |
| parent | e4d2e01f84338d948be51202038842fe3e0f6ce9 (diff) | |
| parent | 69973b830859bc6529a7a0468ba0d80ee5117826 (diff) | |
Merge tag 'v4.9' into 4.9-muqss4.9-muqss-150
Linux 4.9
Diffstat (limited to 'kernel/locking/rtmutex_common.h')
| -rw-r--r-- | kernel/locking/rtmutex_common.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h index 4f5f83c7d2d3..e317e1cbb3eb 100644 --- a/kernel/locking/rtmutex_common.h +++ b/kernel/locking/rtmutex_common.h @@ -75,8 +75,9 @@ task_top_pi_waiter(struct task_struct *p) static inline struct task_struct *rt_mutex_owner(struct rt_mutex *lock) { - return (struct task_struct *) - ((unsigned long)lock->owner & ~RT_MUTEX_OWNER_MASKALL); + unsigned long owner = (unsigned long) READ_ONCE(lock->owner); + + return (struct task_struct *) (owner & ~RT_MUTEX_OWNER_MASKALL); } /* |