From df2f5e721ed36e21da27e1f415c71ba0e20f31b5 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 30 Nov 2005 16:02:54 +0000 Subject: [PATCH] [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 --- arch/arm/mm/flush.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c index c9a03981b78..330695b6b19 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); -- 2.20.1