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    Subject[RFC PATCH 08/17] powerpc/e500: Remove conditional "lwsync" substitution
    Date
    As FreeScale e500 systems have different cacheline sizes from e500mc, it
    is basically impossible for the kernel to support both in a single
    system image at present.

    Given that one is SPE-float and the other is classic-float, they are not
    generally userspace-compatible either.

    This patch updates the conditional to depend on whether the system is
    actually targetting an "e500" or "e500mc" core and entirely removes the
    unused sync-to-lwsync-replacement on e500v1/e500v2 systems.

    Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
    ---
    arch/powerpc/include/asm/synch.h | 16 ++++------------
    1 files changed, 4 insertions(+), 12 deletions(-)

    diff --git a/arch/powerpc/include/asm/synch.h b/arch/powerpc/include/asm/synch.h
    index d7cab44..3d518b6 100644
    --- a/arch/powerpc/include/asm/synch.h
    +++ b/arch/powerpc/include/asm/synch.h
    @@ -5,8 +5,11 @@
    #include <linux/stringify.h>
    #include <asm/feature-fixups.h>

    -#if defined(__powerpc64__) || defined(CONFIG_PPC_E500MC)
    +#if defined(__powerpc64__) || defined(CONFIG_FSL_E500MC)
    #define __SUBARCH_HAS_LWSYNC
    +#define LWSYNC lwsync
    +#else
    +#define LWSYNC sync
    #endif

    #ifndef __ASSEMBLY__
    @@ -25,17 +28,6 @@ static inline void isync(void)
    }
    #endif /* __ASSEMBLY__ */

    -#if defined(__powerpc64__)
    -# define LWSYNC lwsync
    -#elif defined(CONFIG_E500)
    -# define LWSYNC \
    - START_LWSYNC_SECTION(96); \
    - sync; \
    - MAKE_LWSYNC_SECTION_ENTRY(96, __lwsync_fixup);
    -#else
    -# define LWSYNC sync
    -#endif
    -
    #ifdef CONFIG_SMP
    #define __PPC_ACQUIRE_BARRIER \
    START_LWSYNC_SECTION(97); \
    --
    1.7.2.5


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