diff options
Diffstat (limited to 'arch/arc/include/asm/mutex.h')
| -rw-r--r-- | arch/arc/include/asm/mutex.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arc/include/asm/mutex.h b/arch/arc/include/asm/mutex.h index 3be5e64da139..a2f88ff9f506 100644 --- a/arch/arc/include/asm/mutex.h +++ b/arch/arc/include/asm/mutex.h @@ -6,4 +6,13 @@ * published by the Free Software Foundation. */ +/* + * xchg() based mutex fast path maintains a state of 0 or 1, as opposed to + * atomic dec based which can "count" any number of lock contenders. + * This ideally needs to be fixed in core, but for now switching to dec ver. + */ +#if defined(CONFIG_SMP) && (CONFIG_NR_CPUS > 2) +#include <asm-generic/mutex-dec.h> +#else #include <asm-generic/mutex-xchg.h> +#endif |