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[ARM SMP] Disable lazy flush_dcache_page for SMP

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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>
This commit is contained in:
Russell King 2005-11-30 16:02:54 +00:00 committed by Russell King
parent d2ef5ebb4c
commit df2f5e721e
1 changed files with 6 additions and 1 deletions
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arch/arm/mm/flush.c
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@ -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);