crypto: tcrypt - Speed testing support for ghash

[safe/jmp/linux-2.6] / crypto / scatterwalk.c

diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index 297e19d..3de89a4 100644 (file)
--- 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) {
@@ -105,6 +106,9 @@ void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,
        struct scatter_walk walk;
        unsigned int offset = 0;
 
+       if (!nbytes)
+               return;
+
        for (;;) {
                scatterwalk_start(&walk, sg);