diff options
| author | Joel Stanley <joel@jms.id.au> | 2016-08-04 13:24:41 +0930 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2016-08-04 13:24:41 +0930 |
| commit | b916113d820adc856aad6b8ebc1a25403ff7f293 (patch) | |
| tree | abddf239d912c4868faf9fbc69c67d980f74c7df /kernel/locking/mutex.c | |
| parent | 2e4db6c6be91ade074c1a150a6db2aeb4920e25c (diff) | |
| parent | b05965f284db3e086022f4e318e46cb5bffb1376 (diff) | |
| download | talos-obmc-linux-openbmc-4.4-20160804-1.tar.gz talos-obmc-linux-openbmc-4.4-20160804-1.zip | |
Merge tag 'v4.4.16' into dev-4.4openbmc-4.4-20160804-1
This is the 4.4.16 stable release
Signed-off-by: Joel Stanley <joel@jms.id.au>
Diffstat (limited to 'kernel/locking/mutex.c')
| -rw-r--r-- | kernel/locking/mutex.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index 0551c219c40e..89350f924c85 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -486,9 +486,6 @@ __ww_mutex_lock_check_stamp(struct mutex *lock, struct ww_acquire_ctx *ctx) if (!hold_ctx) return 0; - if (unlikely(ctx == hold_ctx)) - return -EALREADY; - if (ctx->stamp - hold_ctx->stamp <= LONG_MAX && (ctx->stamp != hold_ctx->stamp || ctx > hold_ctx)) { #ifdef CONFIG_DEBUG_MUTEXES @@ -514,6 +511,12 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, unsigned long flags; int ret; + if (use_ww_ctx) { + struct ww_mutex *ww = container_of(lock, struct ww_mutex, base); + if (unlikely(ww_ctx == READ_ONCE(ww->ctx))) + return -EALREADY; + } + preempt_disable(); mutex_acquire_nest(&lock->dep_map, subclass, 0, nest_lock, ip); |
