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authorPaul Mundt <lethal@linux-sh.org>2010-12-01 15:39:51 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-12-01 15:39:51 +0900
commit55661fc1f105ed75852e937bf8ea408270eb0cca (patch)
treeaa96c0c6dd0a8230f9373cab32cd069564d27d23 /arch/sh/mm/cache-sh7705.c
parent22a5b566c8c442b0b35b3b106795e2f2b3578096 (diff)
sh: Assume new page cache pages have dirty dcache lines.
This follows the ARM change c01778001a4f5ad9c62d882776235f3f31922fdd ("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: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/cache-sh7705.c')
-rw-r--r--arch/sh/mm/cache-sh7705.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index f498da1cce7a..7729cca727eb 100644
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -139,7 +139,7 @@ static void sh7705_flush_dcache_page(void *arg)
struct address_space *mapping = page_mapping(page);
if (mapping && !mapping_mapped(mapping))
- set_bit(PG_dcache_dirty, &page->flags);
+ clear_bit(PG_dcache_clean, &page->flags);
else
__flush_dcache_page(__pa(page_address(page)));
}