diff options
| author | Ingo Molnar <mingo@kernel.org> | 2017-08-21 09:45:19 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-21 09:45:19 +0200 |
| commit | 94edf6f3c20c9c8ee301bde04150a91bab4bf32c (patch) | |
| tree | 4a2af658258cf42fde24c1224e44c3e6a18c2792 /arch/tile/lib/spinlock_32.c | |
| parent | d5da6457bfadf64ff78f1816ae8329dbbba19513 (diff) | |
| parent | 656e7c0c0a2e8d899f87fd7f081ea7a711146604 (diff) | |
Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU updates from Paul E. McKenney:
- Removal of spin_unlock_wait()
- SRCU updates
- Torture-test updates
- Documentation updates
- Miscellaneous fixes
- CPU-hotplug fixes
- Miscellaneous non-RCU fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/tile/lib/spinlock_32.c')
| -rw-r--r-- | arch/tile/lib/spinlock_32.c | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/arch/tile/lib/spinlock_32.c b/arch/tile/lib/spinlock_32.c index 076c6cc43113..db9333f2447c 100644 --- a/arch/tile/lib/spinlock_32.c +++ b/arch/tile/lib/spinlock_32.c @@ -62,29 +62,6 @@ int arch_spin_trylock(arch_spinlock_t *lock) } EXPORT_SYMBOL(arch_spin_trylock); -void arch_spin_unlock_wait(arch_spinlock_t *lock) -{ - u32 iterations = 0; - int curr = READ_ONCE(lock->current_ticket); - int next = READ_ONCE(lock->next_ticket); - - /* Return immediately if unlocked. */ - if (next == curr) - return; - - /* Wait until the current locker has released the lock. */ - do { - delay_backoff(iterations++); - } while (READ_ONCE(lock->current_ticket) == curr); - - /* - * The TILE architecture doesn't do read speculation; therefore - * a control dependency guarantees a LOAD->{LOAD,STORE} order. - */ - barrier(); -} -EXPORT_SYMBOL(arch_spin_unlock_wait); - /* * The low byte is always reserved to be the marker for a "tns" operation * since the low bit is set to "1" by a tns. The next seven bits are |