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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 23:07:52 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 23:07:52 (GMT) |
| commit | 3e42dee676e8cf5adca817b1518b2e99d1c138ff (patch) | |
| tree | 23580fe97d1e452667b507c2aadb99877d0b574c /kernel | |
| parent | 42daabf62bfa3c00974b43f030dadcf704c0db59 (diff) | |
| parent | 88c8004fd3a5fdd2378069de86b90b21110d33a4 (diff) | |
| download | linux-fsl-qoriq-3e42dee676e8cf5adca817b1518b2e99d1c138ff.tar.xz | |
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')
| -rw-r--r-- | kernel/Kconfig.locks | 6 | ||||
| -rw-r--r-- | kernel/futex.c | 6 | ||||
| -rw-r--r-- | kernel/rtmutex.c | 13 |
3 files changed, 20 insertions, 5 deletions
diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks index 44511d1..d2b32ac 100644 --- a/kernel/Kconfig.locks +++ b/kernel/Kconfig.locks @@ -138,7 +138,7 @@ config INLINE_SPIN_UNLOCK_BH config INLINE_SPIN_UNLOCK_IRQ def_bool y - depends on !PREEMPT || ARCH_INLINE_SPIN_UNLOCK_BH + depends on !PREEMPT || ARCH_INLINE_SPIN_UNLOCK_IRQ config INLINE_SPIN_UNLOCK_IRQRESTORE def_bool y @@ -175,7 +175,7 @@ config INLINE_READ_UNLOCK_BH config INLINE_READ_UNLOCK_IRQ def_bool y - depends on !PREEMPT || ARCH_INLINE_READ_UNLOCK_BH + depends on !PREEMPT || ARCH_INLINE_READ_UNLOCK_IRQ config INLINE_READ_UNLOCK_IRQRESTORE def_bool y @@ -212,7 +212,7 @@ config INLINE_WRITE_UNLOCK_BH config INLINE_WRITE_UNLOCK_IRQ def_bool y - depends on !PREEMPT || ARCH_INLINE_WRITE_UNLOCK_BH + depends on !PREEMPT || ARCH_INLINE_WRITE_UNLOCK_IRQ config INLINE_WRITE_UNLOCK_IRQRESTORE def_bool y diff --git a/kernel/futex.c b/kernel/futex.c index b26dcfc..c3a1a55 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -61,6 +61,8 @@ #include <linux/nsproxy.h> #include <linux/ptrace.h> #include <linux/sched/rt.h> +#include <linux/hugetlb.h> +#include <linux/freezer.h> #include <asm/futex.h> @@ -365,7 +367,7 @@ again: } else { key->both.offset |= FUT_OFF_INODE; /* inode-based key */ key->shared.inode = page_head->mapping->host; - key->shared.pgoff = page_head->index; + key->shared.pgoff = basepage_index(page); } get_futex_key_refs(key); @@ -1807,7 +1809,7 @@ static void futex_wait_queue_me(struct futex_hash_bucket *hb, struct futex_q *q, * is no timeout, or if it has yet to expire. */ if (!timeout || timeout->task) - schedule(); + freezable_schedule(); } __set_current_state(TASK_RUNNING); } diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c index 1e09308..0dd6aec 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, |