NFS: kzalloc conversion in fs/nfs

this converts fs/nfs to kzalloc() usage.
compile tested with make allyesconfig

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index d6ad449..92ecf24 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -100,10 +100,8 @@
 			p->pagevec = &p->page_array[0];
 		else {
 			size_t size = ++pagecount * sizeof(struct page *);
-			p->pagevec = kmalloc(size, GFP_NOFS);
-			if (p->pagevec) {
-				memset(p->pagevec, 0, size);
-			} else {
+			p->pagevec = kzalloc(size, GFP_NOFS);
+			if (!p->pagevec) {
 				mempool_free(p, nfs_commit_mempool);
 				p = NULL;
 			}