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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-11-30 17:02:54 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-11-30 17:02:54 +0100
commitdf2f5e721ed36e21da27e1f415c71ba0e20f31b5 (patch)
tree1c2df43e11a802a5316d1523bb73e6bd7d152c5a /arch/arm
parentMerge master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc-merge (diff)
downloadlinux-df2f5e721ed36e21da27e1f415c71ba0e20f31b5.tar.xz
linux-df2f5e721ed36e21da27e1f415c71ba0e20f31b5.zip
[ARM SMP] Disable lazy flush_dcache_page for SMP
Lazy flush_dcache_page() causes userspace instability on SMP platforms, so disable it for now. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mm/flush.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index c9a03981b785..330695b6b19d 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -155,14 +155,19 @@ static void __flush_dcache_aliases(struct address_space *mapping, struct page *p
* space mappings, we can be lazy and remember that we may have dirty
* kernel cache lines for later. Otherwise, we assume we have
* aliasing mappings.
+ *
+ * Note that we disable the lazy flush for SMP.
*/
void flush_dcache_page(struct page *page)
{
struct address_space *mapping = page_mapping(page);
+#ifndef CONFIG_SMP
if (mapping && !mapping_mapped(mapping))
set_bit(PG_dcache_dirty, &page->flags);
- else {
+ else
+#endif
+ {
__flush_dcache_page(mapping, page);
if (mapping && cache_is_vivt())
__flush_dcache_aliases(mapping, page);