diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-13 12:38:26 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-13 12:38:26 -0800 |
commit | 8e9a2dba8686187d8c8179e5b86640e653963889 (patch) | |
tree | a4ba543649219cbb28d91aab65b785d763f5d069 /arch/s390/lib/spinlock.c | |
parent | 6098850e7e6978f95a958f79a645a653228d0002 (diff) | |
parent | 450cbdd0125cfa5d7bbf9e2a6b6961cc48d29730 (diff) | |
download | linux-stable-8e9a2dba8686187d8c8179e5b86640e653963889.tar.gz linux-stable-8e9a2dba8686187d8c8179e5b86640e653963889.tar.bz2 linux-stable-8e9a2dba8686187d8c8179e5b86640e653963889.zip |
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core locking updates from Ingo Molnar:
"The main changes in this cycle are:
- Another attempt at enabling cross-release lockdep dependency
tracking (automatically part of CONFIG_PROVE_LOCKING=y), this time
with better performance and fewer false positives. (Byungchul Park)
- Introduce lockdep_assert_irqs_enabled()/disabled() and convert
open-coded equivalents to lockdep variants. (Frederic Weisbecker)
- Add down_read_killable() and use it in the VFS's iterate_dir()
method. (Kirill Tkhai)
- Convert remaining uses of ACCESS_ONCE() to
READ_ONCE()/WRITE_ONCE(). Most of the conversion was Coccinelle
driven. (Mark Rutland, Paul E. McKenney)
- Get rid of lockless_dereference(), by strengthening Alpha atomics,
strengthening READ_ONCE() with smp_read_barrier_depends() and thus
being able to convert users of lockless_dereference() to
READ_ONCE(). (Will Deacon)
- Various micro-optimizations:
- better PV qspinlocks (Waiman Long),
- better x86 barriers (Michael S. Tsirkin)
- better x86 refcounts (Kees Cook)
- ... plus other fixes and enhancements. (Borislav Petkov, Juergen
Gross, Miguel Bernal Marin)"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits)
locking/x86: Use LOCK ADD for smp_mb() instead of MFENCE
rcu: Use lockdep to assert IRQs are disabled/enabled
netpoll: Use lockdep to assert IRQs are disabled/enabled
timers/posix-cpu-timers: Use lockdep to assert IRQs are disabled/enabled
sched/clock, sched/cputime: Use lockdep to assert IRQs are disabled/enabled
irq_work: Use lockdep to assert IRQs are disabled/enabled
irq/timings: Use lockdep to assert IRQs are disabled/enabled
perf/core: Use lockdep to assert IRQs are disabled/enabled
x86: Use lockdep to assert IRQs are disabled/enabled
smp/core: Use lockdep to assert IRQs are disabled/enabled
timers/hrtimer: Use lockdep to assert IRQs are disabled/enabled
timers/nohz: Use lockdep to assert IRQs are disabled/enabled
workqueue: Use lockdep to assert IRQs are disabled/enabled
irq/softirqs: Use lockdep to assert IRQs are disabled/enabled
locking/lockdep: Add IRQs disabled/enabled assertion APIs: lockdep_assert_irqs_enabled()/disabled()
locking/pvqspinlock: Implement hybrid PV queued/unfair locks
locking/rwlocks: Fix comments
x86/paravirt: Set up the virt_spin_lock_key after static keys get initialized
block, locking/lockdep: Assign a lock_class per gendisk used for wait_for_completion()
workqueue: Remove now redundant lock acquisitions wrt. workqueue flushes
...
Diffstat (limited to 'arch/s390/lib/spinlock.c')
-rw-r--r-- | arch/s390/lib/spinlock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c index 2a781cb6515c..84c0faeaf7ea 100644 --- a/arch/s390/lib/spinlock.c +++ b/arch/s390/lib/spinlock.c @@ -215,7 +215,7 @@ static inline void arch_spin_lock_classic(arch_spinlock_t *lp) lockval = SPINLOCK_LOCKVAL; /* cpu + 1 */ /* Pass the virtual CPU to the lock holder if it is not running */ - owner = arch_spin_yield_target(ACCESS_ONCE(lp->lock), NULL); + owner = arch_spin_yield_target(READ_ONCE(lp->lock), NULL); if (owner && arch_vcpu_is_preempted(owner - 1)) smp_yield_cpu(owner - 1); |