diff options
author | David S. Miller <davem@davemloft.net> | 2016-08-18 01:17:32 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-08-18 01:17:32 -0400 |
commit | 60747ef4d173c2747bf7f0377fb22846cb422195 (patch) | |
tree | ea0faf33b952495c47909be1400c475a3f3821b0 /arch/sh/include/asm/cmpxchg-cas.h | |
parent | 484334198f8ce9552e20930fff9408ebf6bcf94d (diff) | |
parent | 184ca823481c99dadd7d946e5afd4bb921eab30d (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Minor overlapping changes for both merge conflicts.
Resolution work done by Stephen Rothwell was used
as a reference.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sh/include/asm/cmpxchg-cas.h')
-rw-r--r-- | arch/sh/include/asm/cmpxchg-cas.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/sh/include/asm/cmpxchg-cas.h b/arch/sh/include/asm/cmpxchg-cas.h new file mode 100644 index 000000000000..d0d86649e8c1 --- /dev/null +++ b/arch/sh/include/asm/cmpxchg-cas.h @@ -0,0 +1,24 @@ +#ifndef __ASM_SH_CMPXCHG_CAS_H +#define __ASM_SH_CMPXCHG_CAS_H + +static inline unsigned long +__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new) +{ + __asm__ __volatile__("cas.l %1,%0,@r0" + : "+r"(new) + : "r"(old), "z"(m) + : "t", "memory" ); + return new; +} + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + unsigned long old; + do old = *m; + while (__cmpxchg_u32(m, old, val) != old); + return old; +} + +#include <asm/cmpxchg-xchg.h> + +#endif /* __ASM_SH_CMPXCHG_CAS_H */ |