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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2005-11-30 17:02:54 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-11-30 17:02:54 +0100 |
| commit | df2f5e721ed36e21da27e1f415c71ba0e20f31b5 (patch) | |
| tree | 1c2df43e11a802a5316d1523bb73e6bd7d152c5a | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc-merge (diff) | |
| download | linux-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>
| -rw-r--r-- | arch/arm/mm/flush.c | 7 |
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); |