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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-13 23:38:26 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-13 23:38:26 +0300 |
commit | 8e9a2dba8686187d8c8179e5b86640e653963889 (patch) | |
tree | a4ba543649219cbb28d91aab65b785d763f5d069 /arch/metag | |
parent | 6098850e7e6978f95a958f79a645a653228d0002 (diff) | |
parent | 450cbdd0125cfa5d7bbf9e2a6b6961cc48d29730 (diff) | |
download | linux-8e9a2dba8686187d8c8179e5b86640e653963889.tar.xz |
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/metag')
-rw-r--r-- | arch/metag/include/asm/spinlock.h | 9 | ||||
-rw-r--r-- | arch/metag/include/asm/spinlock_lnkget.h | 37 | ||||
-rw-r--r-- | arch/metag/include/asm/spinlock_lock1.h | 20 |
3 files changed, 0 insertions, 66 deletions
diff --git a/arch/metag/include/asm/spinlock.h b/arch/metag/include/asm/spinlock.h index 349938c35f2d..4497c232d9c1 100644 --- a/arch/metag/include/asm/spinlock.h +++ b/arch/metag/include/asm/spinlock.h @@ -16,13 +16,4 @@ * locked. */ -#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) - -#define arch_read_lock_flags(lock, flags) arch_read_lock(lock) -#define arch_write_lock_flags(lock, flags) arch_write_lock(lock) - -#define arch_spin_relax(lock) cpu_relax() -#define arch_read_relax(lock) cpu_relax() -#define arch_write_relax(lock) cpu_relax() - #endif /* __ASM_SPINLOCK_H */ diff --git a/arch/metag/include/asm/spinlock_lnkget.h b/arch/metag/include/asm/spinlock_lnkget.h index 029935560b7f..dfd780eab350 100644 --- a/arch/metag/include/asm/spinlock_lnkget.h +++ b/arch/metag/include/asm/spinlock_lnkget.h @@ -137,21 +137,6 @@ static inline void arch_write_unlock(arch_rwlock_t *rw) : "memory"); } -/* write_can_lock - would write_trylock() succeed? */ -static inline int arch_write_can_lock(arch_rwlock_t *rw) -{ - int ret; - - asm volatile ("LNKGETD %0, [%1]\n" - "CMP %0, #0\n" - "MOV %0, #1\n" - "XORNZ %0, %0, %0\n" - : "=&d" (ret) - : "da" (&rw->lock) - : "cc"); - return ret; -} - /* * Read locks are a bit more hairy: * - Exclusively load the lock value. @@ -225,26 +210,4 @@ static inline int arch_read_trylock(arch_rwlock_t *rw) return tmp; } -/* read_can_lock - would read_trylock() succeed? */ -static inline int arch_read_can_lock(arch_rwlock_t *rw) -{ - int tmp; - - asm volatile ("LNKGETD %0, [%1]\n" - "CMP %0, %2\n" - "MOV %0, #1\n" - "XORZ %0, %0, %0\n" - : "=&d" (tmp) - : "da" (&rw->lock), "bd" (0x80000000) - : "cc"); - return tmp; -} - -#define arch_read_lock_flags(lock, flags) arch_read_lock(lock) -#define arch_write_lock_flags(lock, flags) arch_write_lock(lock) - -#define arch_spin_relax(lock) cpu_relax() -#define arch_read_relax(lock) cpu_relax() -#define arch_write_relax(lock) cpu_relax() - #endif /* __ASM_SPINLOCK_LNKGET_H */ diff --git a/arch/metag/include/asm/spinlock_lock1.h b/arch/metag/include/asm/spinlock_lock1.h index 12de9862d190..c0bd81bbe18c 100644 --- a/arch/metag/include/asm/spinlock_lock1.h +++ b/arch/metag/include/asm/spinlock_lock1.h @@ -105,16 +105,6 @@ static inline void arch_write_unlock(arch_rwlock_t *rw) rw->lock = 0; } -/* write_can_lock - would write_trylock() succeed? */ -static inline int arch_write_can_lock(arch_rwlock_t *rw) -{ - unsigned int ret; - - barrier(); - ret = rw->lock; - return (ret == 0); -} - /* * Read locks are a bit more hairy: * - Exclusively load the lock value. @@ -172,14 +162,4 @@ static inline int arch_read_trylock(arch_rwlock_t *rw) return (ret < 0x80000000); } -/* read_can_lock - would read_trylock() succeed? */ -static inline int arch_read_can_lock(arch_rwlock_t *rw) -{ - unsigned int ret; - - barrier(); - ret = rw->lock; - return (ret < 0x80000000); -} - #endif /* __ASM_SPINLOCK_LOCK1_H */ |