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Diffstat (limited to 'arch/sh/mm/cache-sh4.c')
| -rw-r--r-- | arch/sh/mm/cache-sh4.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c index c6955157c98..72bb4877333 100644 --- a/arch/sh/mm/cache-sh4.c +++ b/arch/sh/mm/cache-sh4.c @@ -236,10 +236,20 @@ static inline void flush_cache_4096(unsigned long start, /* * Write back & invalidate the D-cache of the page. * (To avoid "alias" issues) + * + * This uses a lazy write-back on UP, which is explicitly + * disabled on SMP. */ void flush_dcache_page(struct page *page) { - if (test_bit(PG_mapped, &page->flags)) { +#ifndef CONFIG_SMP + struct address_space *mapping = page_mapping(page); + + if (mapping && !mapping_mapped(mapping)) + set_bit(PG_dcache_dirty, &page->flags); + else +#endif + { unsigned long phys = PHYSADDR(page_address(page)); unsigned long addr = CACHE_OC_ADDRESS_ARRAY; int i, n; |