Commit 7e000729 authored by Al Viro's avatar Al Viro Committed by Paul E. McKenney
Browse files

parisc: unify implementations of __cmpxchg_u{8,32,64} 



identical except for type name involved

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 29b8e53c

arch/parisc/lib/bitops.c

+16 −35
Original line number Diff line number Diff line
@@ -56,38 +56,19 @@ unsigned long notrace __xchg8(char x, volatile char *ptr) 
}





u64 notrace __cmpxchg_u64(volatile u64 *ptr, u64 old, u64 new)

{

	unsigned long flags;

	u64 prev;



	_atomic_spin_lock_irqsave(ptr, flags);

	if ((prev = *ptr) == old)

		*ptr = new;

	_atomic_spin_unlock_irqrestore(ptr, flags);

	return prev;

}



u32 notrace __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new)

{

	unsigned long flags;

	u32 prev;



	_atomic_spin_lock_irqsave(ptr, flags);

	if ((prev = *ptr) == old)

		*ptr = new;

	_atomic_spin_unlock_irqrestore(ptr, flags);

	return prev;

#define CMPXCHG(T)						\

	T notrace __cmpxchg_##T(volatile T *ptr, T old, T new)	\

	{							\

		unsigned long flags;				\

		T prev;						\

								\

		_atomic_spin_lock_irqsave(ptr, flags);		\

		if ((prev = *ptr) == old)			\

			*ptr = new;				\

		_atomic_spin_unlock_irqrestore(ptr, flags);	\

		return prev;					\

	}



u8 notrace __cmpxchg_u8(volatile u8 *ptr, u8 old, u8 new)

{

	unsigned long flags;

	u8 prev;



	_atomic_spin_lock_irqsave(ptr, flags);

	if ((prev = *ptr) == old)

		*ptr = new;

	_atomic_spin_unlock_irqrestore(ptr, flags);

	return prev;

}
 
CMPXCHG(u64)

CMPXCHG(u32)

CMPXCHG(u8)