X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=crypto%2Fscatterwalk.c;h=3de89a424401c1918818145a3d27df627c99f7ef;hb=9919c7619c52d01e89103bca405cc3d4a2b1ac31;hp=e93a8f6f35d48b32f76815c0a9b6676ccbd65775;hpb=5fa0fea27461f5ff7fad07687618db08272e9502;p=safe%2Fjmp%2Flinux-2.6

diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index e93a8f6..3de89a4 100644
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -13,6 +13,8 @@
  * any later version.
  *
  */
+
+#include <crypto/scatterwalk.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/module.h>
@@ -20,17 +22,6 @@
 #include <linux/highmem.h>
 #include <linux/scatterlist.h>
 
-#include "internal.h"
-#include "scatterwalk.h"
-
-enum km_type crypto_km_types[] = {
-	KM_USER0,
-	KM_USER1,
-	KM_SOFTIRQ0,
-	KM_SOFTIRQ1,
-};
-EXPORT_SYMBOL_GPL(crypto_km_types);
-
 static inline void memcpy_dir(void *buf, void *sgdata, size_t nbytes, int out)
 {
 	void *src = out ? buf : sgdata;
@@ -62,15 +53,16 @@ static void scatterwalk_pagedone(struct scatter_walk *walk, int out,
 	if (out) {
 		struct page *page;
 
-		page = walk->sg->page + ((walk->offset - 1) >> PAGE_SHIFT);
-		flush_dcache_page(page);
+		page = sg_page(walk->sg) + ((walk->offset - 1) >> PAGE_SHIFT);
+		if (!PageSlab(page))
+			flush_dcache_page(page);
 	}
 
 	if (more) {
 		walk->offset += PAGE_SIZE - 1;
 		walk->offset &= PAGE_MASK;
 		if (walk->offset >= walk->sg->offset + walk->sg->length)
-			scatterwalk_start(walk, sg_next(walk->sg));
+			scatterwalk_start(walk, scatterwalk_sg_next(walk->sg));
 	}
 }
 
@@ -114,6 +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);
 
@@ -121,7 +116,7 @@ void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,
 			break;
 
 		offset += sg->length;
-		sg = sg_next(sg);
+		sg = scatterwalk_sg_next(sg);
 	}
 
 	scatterwalk_advance(&walk, start - offset);