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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 16:07:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 16:07:52 -0700 |
| commit | 3e42dee676e8cf5adca817b1518b2e99d1c138ff (patch) | |
| tree | 23580fe97d1e452667b507c2aadb99877d0b574c /kernel/rtmutex.c | |
| parent | 42daabf62bfa3c00974b43f030dadcf704c0db59 (diff) | |
| parent | 88c8004fd3a5fdd2378069de86b90b21110d33a4 (diff) | |
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking changes from Ingo Molnar:
"Four miscellanous standalone fixes for futexes, rtmutexes and
Kconfig.locks."
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Use freezable blocking call
futex: Take hugepages into account when generating futex_key
rtmutex: Document rt_mutex_adjust_prio_chain()
locking: Fix copy/paste errors of "ARCH_INLINE_*_UNLOCK_BH"
Diffstat (limited to 'kernel/rtmutex.c')
| -rw-r--r-- | kernel/rtmutex.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c index 1e09308bf2a..0dd6aec1cb6 100644 --- a/kernel/rtmutex.c +++ b/kernel/rtmutex.c @@ -145,6 +145,19 @@ int max_lock_depth = 1024; /* * Adjust the priority chain. Also used for deadlock detection. * Decreases task's usage by one - may thus free the task. + * + * @task: the task owning the mutex (owner) for which a chain walk is probably + * needed + * @deadlock_detect: do we have to carry out deadlock detection? + * @orig_lock: the mutex (can be NULL if we are walking the chain to recheck + * things for a task that has just got its priority adjusted, and + * is waiting on a mutex) + * @orig_waiter: rt_mutex_waiter struct for the task that has just donated + * its priority to the mutex owner (can be NULL in the case + * depicted above or if the top waiter is gone away and we are + * actually deboosting the owner) + * @top_task: the current top waiter + * * Returns 0 or -EDEADLK. */ static int rt_mutex_adjust_prio_chain(struct task_struct *task, |