crypto: Use vzalloc

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/deflate.c b/crypto/deflate.c
index 463dc85..cbc7a33 100644
--- a/crypto/deflate.c
+++ b/crypto/deflate.c
@@ -48,12 +48,11 @@
 	int ret = 0;
 	struct z_stream_s *stream = &ctx->comp_stream;
 
-	stream->workspace = vmalloc(zlib_deflate_workspacesize());
+	stream->workspace = vzalloc(zlib_deflate_workspacesize());
 	if (!stream->workspace) {
 		ret = -ENOMEM;
 		goto out;
 	}
-	memset(stream->workspace, 0, zlib_deflate_workspacesize());
 	ret = zlib_deflateInit2(stream, DEFLATE_DEF_LEVEL, Z_DEFLATED,
 	                        -DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL,
 	                        Z_DEFAULT_STRATEGY);