>
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
> CC:
clameter@sgi.com
> CC:
parisc-linux@parisc-linux.org
> ---
> include/asm-parisc/atomic.h | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> Index: linux-2.6-lttng/include/asm-parisc/atomic.h
> ===================================================================
> --- linux-2.6-lttng.orig/include/asm-parisc/atomic.h 2007-07-20 19:44:40.000000000 -0400
> +++ linux-2.6-lttng/include/asm-parisc/atomic.h 2007-07-20 19:44:47.000000000 -0400
> @@ -122,6 +122,35 @@ __cmpxchg(volatile void *ptr, unsigned l
> (unsigned long)_n_, sizeof(*(ptr))); \
> })
>
> +#include <asm-generic/cmpxchg-local.h>
> +
> +static inline unsigned long __cmpxchg_local(volatile void *ptr,
> + unsigned long old,
> + unsigned long new_, int size)
> +{
> + switch (size) {
> +#ifdef CONFIG_64BIT
> + case 8: return __cmpxchg_u64((unsigned long *)ptr, old, new_);
> +#endif
> + case 4: return __cmpxchg_u32(ptr, old, new_);
> + default:
> + return __cmpxchg_local_generic(ptr, old, new_, size);
> + }
> +}
> +
> +/*
> + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
> + * them available.
> + */
> +#define cmpxchg_local(ptr,o,n) \
> + (__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \
> + (unsigned long)(n), sizeof(*(ptr)))
> +#ifdef CONFIG_64BIT
> +#define cmpxchg64_local(ptr,o,n) cmpxchg_local((ptr), (o), (n))
> +#else
> +#define cmpxchg64_local(ptr,o,n) __cmpxchg64_local_generic((ptr), (o), (n))
> +#endif
> +
> /* Note that we need not lock read accesses - aligned word writes/reads
> * are atomic, so a reader never sees unconsistent values.
> *
>
> --
> Mathieu Desnoyers
> Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
> OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
> _______________________________________________
> parisc-linux mailing list
>
parisc-linux@lists.parisc-linux.org
>
http://lists.parisc-linux.org/mailman/listinfo/parisc-linux
