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| author | Hugh Dickins <hugh@veritas.com> | 2007-06-21 23:27:45 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-21 15:55:12 -0700 |
| commit | b9bae3402572dc50a1e084c5b1ae5117918ef0f0 (patch) | |
| tree | b351181fffd09e06c0b3f185a0571cdb2860e870 /include | |
| parent | f1518a088bde6aea49e7c472ed6ab96178fcba3e (diff) | |
| download | lwn-b9bae3402572dc50a1e084c5b1ae5117918ef0f0.tar.gz lwn-b9bae3402572dc50a1e084c5b1ae5117918ef0f0.zip | |
page_mapping must avoid slub pages
Nicolas Ferre reports oops from flush_dcache_page() on ARM when using
SLUB: which reuses page->mapping as page->slab. The page_mapping()
function, used by ARM and PA-RISC flush_dcache_page() implementations,
must not confuse SLUB pages with those which have page->mapping set.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index e4183c6c7de3..1c1207472bb4 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -603,6 +603,10 @@ static inline struct address_space *page_mapping(struct page *page) if (unlikely(PageSwapCache(page))) mapping = &swapper_space; +#ifdef CONFIG_SLUB + else if (unlikely(PageSlab(page))) + mapping = NULL; +#endif else if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON)) mapping = NULL; return mapping; |