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    sh: Assume new page cache pages have dirty dcache lines. · 55661fc1
    Paul Mundt 提交于
    This follows the ARM change c0177800
    ("ARM: 6379/1: Assume new page cache pages have dirty D-cache") for the
    same rationale:
    
        There are places in Linux where writes to newly allocated page
        cache pages happen without a subsequent call to flush_dcache_page()
        (several PIO drivers including USB HCD). This patch changes the
        meaning of PG_arch_1 to be PG_dcache_clean and always flush the
        D-cache for a newly mapped page in update_mmu_cache().
    
    This addresses issues seen with executing binaries from MMC, in
    addition to some of the other HCDs that don't explicitly do cache
    management for their pipe-in buffers.
    Requested-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
    Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
    55661fc1
cache-sh7705.c 4.8 KB