crypto: scatterwalk - Avoid flush_dcache_page on slab pages

It's illegal to call flush_dcache_page on slab pages on a number of architectures. So this patch avoids doing so if PageSlab is true. In future we can move the flush_dcache_page call to those page cache users that actually need it. Reported-by: David S. Miller <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
adimgong · Feb 9, 2009 · 4f3e797 · 4f3e797
1 parent 412e87a
commit 4f3e797
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
@@ -54,7 +54,8 @@ static void scatterwalk_pagedone(struct scatter_walk *walk, int out,
 		struct page *page;
 
 		page = sg_page(walk->sg) + ((walk->offset - 1) >> PAGE_SHIFT);
-		flush_dcache_page(page);
+		if (!PageSlab(page))
+			flush_dcache_page(page);
 	}
 
 	if (more) {