lkml.org 
[lkml]   [2007]   [Aug]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[patch 13/23] Add cmpxchg_local to m86k
    Use the new generic cmpxchg_local (disables interrupt). Also use the generic
    cmpxchg as fallback if SMP is not set.

    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
    CC: clameter@sgi.com
    CC: zippel@linux-m68k.org
    CC: linux-m68k@lists.linux-m68k.org
    ---
    include/asm-m68k/system.h | 21 +++++++++++++++++++++
    1 file changed, 21 insertions(+)

    Index: linux-2.6-lttng/include/asm-m68k/system.h
    ===================================================================
    --- linux-2.6-lttng.orig/include/asm-m68k/system.h 2007-08-07 14:31:51.000000000 -0400
    +++ linux-2.6-lttng/include/asm-m68k/system.h 2007-08-07 15:01:41.000000000 -0400
    @@ -154,6 +154,10 @@ static inline unsigned long __xchg(unsig
    }
    #endif

    +#include <asm-generic/cmpxchg-local.h>
    +
    +#define cmpxchg64_local(ptr,o,n) __cmpxchg64_local_generic((ptr), (o), (n))
    +
    /*
    * Atomic compare and exchange. Compare OLD with MEM, if identical,
    * store NEW in MEM. Return the initial value in MEM. Success is
    @@ -188,6 +192,23 @@ static inline unsigned long __cmpxchg(vo
    #define cmpxchg(ptr,o,n)\
    ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
    (unsigned long)(n),sizeof(*(ptr))))
    +#define cmpxchg_local(ptr,o,n)\
    + ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
    + (unsigned long)(n),sizeof(*(ptr))))
    +#else
    +
    +/*
    + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
    + * them available.
    + */
    +#define cmpxchg_local(ptr,o,n) \
    + (__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o), \
    + (unsigned long)(n), sizeof(*(ptr)))
    +
    +#ifndef CONFIG_SMP
    +#include <asm-generic/cmpxchg.h>
    +#endif
    +
    #endif

    #define arch_align_stack(x) (x)
    --
    Mathieu Desnoyers
    Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
    OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-08-12 17:43    [W:0.023 / U:29.652 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site