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arch: Remove spin_unlock_wait() arch-specific definitions

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There is no agreed-upon definition of spin_unlock_wait()'s semantics,
and it appears that all callers could do just as well with a lock/unlock
pair.  This commit therefore removes the underlying arch-specific
arch_spin_unlock_wait() for all architectures providing them.

Signed-off-by: Paul E. McKenney <[email protected]>
Cc: <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Alan Stern <[email protected]>
Cc: Andrea Parri <[email protected]>
Cc: Linus Torvalds <[email protected]>
Acked-by: Will Deacon <[email protected]>
Acked-by: Boqun Feng <[email protected]>
This commit is contained in:
Paul E. McKenney 2017-06-29 15:53:02 -07:00
commit 952111d7db
21 changed files with 5 additions and 241 deletions
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5
arch/blackfin/include/asm/spinlock.h
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@ -48,11 +48,6 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock)
__raw_spin_unlock_asm(&lock->lock);
}
static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
{
smp_cond_load_acquire(&lock->lock, !VAL);
}
static inline int arch_read_can_lock(arch_rwlock_t *rw)
{
return __raw_uncached_fetch_asm(&rw->lock) > 0;