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sparc32: Add cmpxchg64().

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This fixes the build with i40e driver enabled.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-09-27 22:38:19 -07:00
parent da61e7308d
commit 23198ddffb
2 changed files with 17 additions and 0 deletions
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3
arch/sparc/include/asm/cmpxchg_32.h
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@ -62,6 +62,9 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size)
(unsigned long)_n_, sizeof(*(ptr))); \
})
u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new);
#define cmpxchg64(ptr, old, new) __cmpxchg_u64(ptr, old, new)
#include <asm-generic/cmpxchg-local.h>
/*

14
arch/sparc/lib/atomic32.c
View File

@ -172,6 +172,20 @@ unsigned long __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new)
}
EXPORT_SYMBOL(__cmpxchg_u32);
u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new)
{
unsigned long flags;
u64 prev;
spin_lock_irqsave(ATOMIC_HASH(ptr), flags);
if ((prev = *ptr) == old)
*ptr = new;
spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags);
return prev;
}
EXPORT_SYMBOL(__cmpxchg_u64);
unsigned long __xchg_u32(volatile u32 *ptr, u32 new)
{
unsigned long flags;