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| author | Dan Williams <dan.j.williams@intel.com> | 2017-04-12 21:59:01 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-04-12 21:59:01 -0700 |
| commit | bfca9acf1a5df0ff98fbf47e363adb48612bb7ec (patch) | |
| tree | a50287c88fdc60a73912d205d7bce41b7af53827 /kernel/locking/rwsem-spinlock.c | |
| parent | 92a3fa075d3d2716b9c662814540f1d660cbf2f5 (diff) | |
| parent | 11e63f6d920d6f2dfd3cd421e939a4aec9a58dcd (diff) | |
| download | lwn-bfca9acf1a5df0ff98fbf47e363adb48612bb7ec.tar.gz lwn-bfca9acf1a5df0ff98fbf47e363adb48612bb7ec.zip | |
Merge branch 'for-4.11/libnvdimm' into for-4.12/dax
Diffstat (limited to 'kernel/locking/rwsem-spinlock.c')
| -rw-r--r-- | kernel/locking/rwsem-spinlock.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/kernel/locking/rwsem-spinlock.c b/kernel/locking/rwsem-spinlock.c index 7bc24d477805..c65f7989f850 100644 --- a/kernel/locking/rwsem-spinlock.c +++ b/kernel/locking/rwsem-spinlock.c @@ -213,10 +213,9 @@ int __sched __down_write_common(struct rw_semaphore *sem, int state) */ if (sem->count == 0) break; - if (signal_pending_state(state, current)) { - ret = -EINTR; - goto out; - } + if (signal_pending_state(state, current)) + goto out_nolock; + set_current_state(state); raw_spin_unlock_irqrestore(&sem->wait_lock, flags); schedule(); @@ -224,12 +223,19 @@ int __sched __down_write_common(struct rw_semaphore *sem, int state) } /* got the lock */ sem->count = -1; -out: list_del(&waiter.list); raw_spin_unlock_irqrestore(&sem->wait_lock, flags); return ret; + +out_nolock: + list_del(&waiter.list); + if (!list_empty(&sem->wait_list)) + __rwsem_do_wake(sem, 1); + raw_spin_unlock_irqrestore(&sem->wait_lock, flags); + + return -EINTR; } void __sched __down_write(struct rw_semaphore *sem) |