diff options
| author | David S. Miller <davem@davemloft.net> | 2017-09-27 22:38:19 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-09-27 22:38:19 -0700 |
| commit | 23198ddffb6cddb5d5824230af4dd4b46e4046a4 (patch) | |
| tree | 652e124f2107f25a2d2507057905695375414b72 /arch | |
| parent | da61e7308df868c20a41861c0a11f6eefd822993 (diff) | |
sparc32: Add cmpxchg64().
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/include/asm/cmpxchg_32.h | 3 | ||||
| -rw-r--r-- | arch/sparc/lib/atomic32.c | 14 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/cmpxchg_32.h b/arch/sparc/include/asm/cmpxchg_32.h index 83ffb83c5397..a0101a58fd3f 100644 --- a/arch/sparc/include/asm/cmpxchg_32.h +++ b/arch/sparc/include/asm/cmpxchg_32.h @@ -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> /* diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index 2c373329d5cb..ddacb5aeb424 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -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; |