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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-11-30 11:02:54 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-11-30 11:02:54 -0500
commitdf2f5e721ed36e21da27e1f415c71ba0e20f31b5 (patch)
tree1c2df43e11a802a5316d1523bb73e6bd7d152c5a /arch/arm/mm/flush.c
parentd2ef5ebb4c4fe141a82252d4db8d8521e6765c5a (diff)
[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/mm/flush.c')
-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
155 * space mappings, we can be lazy and remember that we may have dirty 155 * space mappings, we can be lazy and remember that we may have dirty
156 * kernel cache lines for later. Otherwise, we assume we have 156 * kernel cache lines for later. Otherwise, we assume we have
157 * aliasing mappings. 157 * aliasing mappings.
158 *
159 * Note that we disable the lazy flush for SMP.
158 */ 160 */
159void flush_dcache_page(struct page *page) 161void flush_dcache_page(struct page *page)
160{ 162{
161 struct address_space *mapping = page_mapping(page); 163 struct address_space *mapping = page_mapping(page);
162 164
165#ifndef CONFIG_SMP
163 if (mapping && !mapping_mapped(mapping)) 166 if (mapping && !mapping_mapped(mapping))
164 set_bit(PG_dcache_dirty, &page->flags); 167 set_bit(PG_dcache_dirty, &page->flags);
165 else { 168 else
169#endif
170 {
166 __flush_dcache_page(mapping, page); 171 __flush_dcache_page(mapping, page);
167 if (mapping && cache_is_vivt()) 172 if (mapping && cache_is_vivt())
168 __flush_dcache_aliases(mapping, page); 173 __flush_dcache_aliases(mapping, page);