diff options
| author | Alexei Starovoitov <ast@kernel.org> | 2025-09-08 18:00:02 -0700 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2025-09-29 09:42:35 +0200 |
| commit | 4957089a23f41f31f8e7e22802a8ef9f5789c191 (patch) | |
| tree | 9531b4ed88e7710247c3f494720298ecfd3b1d2a /kernel | |
| parent | 4ec1a08d20315d2d2a6f942ea563e5dadd988e98 (diff) | |
locking/local_lock: Introduce local_lock_is_locked().
Introduce local_lock_is_locked() that returns true when
given local_lock is locked by current cpu (in !PREEMPT_RT) or
by current task (in PREEMPT_RT).
The goal is to detect a deadlock by the caller.
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/locking/rtmutex_common.h | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h index 78dd3d8c6554..cf6ddd1b23a2 100644 --- a/kernel/locking/rtmutex_common.h +++ b/kernel/locking/rtmutex_common.h @@ -153,15 +153,6 @@ static inline struct rt_mutex_waiter *task_top_pi_waiter(struct task_struct *p) pi_tree.entry); } -#define RT_MUTEX_HAS_WAITERS 1UL - -static inline struct task_struct *rt_mutex_owner(struct rt_mutex_base *lock) -{ - unsigned long owner = (unsigned long) READ_ONCE(lock->owner); - - return (struct task_struct *) (owner & ~RT_MUTEX_HAS_WAITERS); -} - /* * Constants for rt mutex functions which have a selectable deadlock * detection. |