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

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identical except for type name involved

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Al Viro 2024-04-01 22:29:44 -04:00 committed by Paul E. McKenney
parent 29b8e53c12
commit 7e00072915
1 changed files with 15 additions and 34 deletions
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49
arch/parisc/lib/bitops.c
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@ -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;
#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; \
}
_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;
}
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)