Doug / smarc-fsl-linux-kernel

26 Nov, 2009

1 commit

  • 2d4dc890b   block: add helpers to run flush_dcache_page() against a bio and a request's pages ... Browse Code »

    Mtdblock driver doesn't call flush_dcache_page for pages in request. So,
    this causes problems on architectures where the icache doesn't fill from
    the dcache or with dcache aliases. The patch fixes this.

    The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid
    pointless empty cache-thrashing loops on architectures for which
    flush_dcache_page() is a no-op. Every architecture was provided with this
    flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is
    equal 1 or do nothing otherwise.

    See "fix mtd_blkdevs problem with caches on some architectures" discussion
    on LKML for more information.

    Signed-off-by: Ilya Loginov
    Cc: Ingo Molnar
    Cc: David Woodhouse
    Cc: Peter Horton
    Cc: "Ed L. Cashin"
    Signed-off-by: Jens Axboe

    Ilya Loginov
     

12 Jun, 2009

1 commit

  • 5c01b46bb   asm-generic: add generic NOMMU versions of some headers ... Browse Code »

    Memory management in generic is highly architecture specific,
    but on NOMMU architectures, it is mostly trivial, so just
    add a default implementation in asm-generic that applies
    to all NOMMU architectures.

    The two files cache.h and cacheflush.h can possibly also
    be used by architectures that have an MMU but never require
    flushing the cache or have cache lines larger than 32 bytes.

    Signed-off-by: Remis Lima Baima
    Signed-off-by: Arnd Bergmann

    Arnd Bergmann