[JFFS2] kmem_cache_alloc/memset -> kmem_cache_zalloc

Used kmem_cache_zalloc instead of kmem_cache_alloc/memset.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

fs/jffs2/malloc.c

@@ -284,10 +284,9 @@ void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
 struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
 {
 	struct jffs2_xattr_datum *xd;
-	xd = kmem_cache_alloc(xattr_datum_cache, GFP_KERNEL);
+	xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL);
 	dbg_memalloc("%p\n", xd);
 
-	memset(xd, 0, sizeof(struct jffs2_xattr_datum));
 	xd->class = RAWNODE_CLASS_XATTR_DATUM;
 	xd->node = (void *)xd;
 	INIT_LIST_HEAD(&xd->xindex);
@@ -303,10 +302,9 @@ void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd)
 struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
 {
 	struct jffs2_xattr_ref *ref;
-	ref = kmem_cache_alloc(xattr_ref_cache, GFP_KERNEL);
+	ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL);
 	dbg_memalloc("%p\n", ref);
 
-	memset(ref, 0, sizeof(struct jffs2_xattr_ref));
 	ref->class = RAWNODE_CLASS_XATTR_REF;
 	ref->node = (void *)ref;
 	return ref;