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author | Ingo Molnar <mingo@kernel.org> | 2017-08-21 10:45:19 +0300 |
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committer | Ingo Molnar <mingo@kernel.org> | 2017-08-21 10:45:19 +0300 |
commit | 94edf6f3c20c9c8ee301bde04150a91bab4bf32c (patch) | |
tree | 4a2af658258cf42fde24c1224e44c3e6a18c2792 /arch/powerpc | |
parent | d5da6457bfadf64ff78f1816ae8329dbbba19513 (diff) | |
parent | 656e7c0c0a2e8d899f87fd7f081ea7a711146604 (diff) | |
download | linux-94edf6f3c20c9c8ee301bde04150a91bab4bf32c.tar.xz |
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/powerpc')
-rw-r--r-- | arch/powerpc/include/asm/spinlock.h | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h index 8c1b913de6d7..d256e448ea49 100644 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -170,39 +170,6 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock) lock->slock = 0; } -static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) -{ - arch_spinlock_t lock_val; - - smp_mb(); - - /* - * Atomically load and store back the lock value (unchanged). This - * ensures that our observation of the lock value is ordered with - * respect to other lock operations. - */ - __asm__ __volatile__( -"1: " PPC_LWARX(%0, 0, %2, 0) "\n" -" stwcx. %0, 0, %2\n" -" bne- 1b\n" - : "=&r" (lock_val), "+m" (*lock) - : "r" (lock) - : "cr0", "xer"); - - if (arch_spin_value_unlocked(lock_val)) - goto out; - - while (lock->slock) { - HMT_low(); - if (SHARED_PROCESSOR) - __spin_yield(lock); - } - HMT_medium(); - -out: - smp_mb(); -} - /* * Read-write spinlocks, allowing multiple readers * but only one writer. |