diff options
Diffstat (limited to 'arch/arm/mm/flush.c')
| -rw-r--r-- | arch/arm/mm/flush.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c index 43474d8752a..82f4b06bf6b 100644 --- a/arch/arm/mm/flush.c +++ b/arch/arm/mm/flush.c @@ -189,7 +189,16 @@ static void __flush_dcache_aliases(struct address_space *mapping, struct page *p */ void flush_dcache_page(struct page *page) { - struct address_space *mapping = page_mapping(page); + struct address_space *mapping; + + /* + * The zero page is never written to, so never has any dirty + * cache lines, and therefore never needs to be flushed. + */ + if (page == ZERO_PAGE(0)) + return; + + mapping = page_mapping(page); #ifndef CONFIG_SMP if (!PageHighMem(page) && mapping && !mapping_mapped(mapping)) |