fuse: rearrange and resize fuse_args fields

This makes the structure better packed.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

fs/fuse/fuse_i.h

@@ -287,12 +287,12 @@ struct fuse_page_desc {
 };
 
 struct fuse_args {
-	uint32_t opcode;
 	uint64_t nodeid;
-	unsigned int in_numargs;
+	uint32_t opcode;
+	unsigned short in_numargs;
+	unsigned short out_numargs;
+	bool out_argvar:1;
 	struct fuse_in_arg in_args[3];
-	unsigned int out_argvar:1;
-	unsigned int out_numargs;
 	struct fuse_arg out_args[2];
 };
 

fs/fuse/xattr.c

@@ -70,7 +70,7 @@ ssize_t fuse_getxattr(struct inode *inode, const char *name, void *value,
 	/* This is really two different operations rolled into one */
 	args.out_numargs = 1;
 	if (size) {
-		args.out_argvar = 1;
+		args.out_argvar = true;
 		args.out_args[0].size = size;
 		args.out_args[0].value = value;
 	} else {
@@ -129,7 +129,7 @@ ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
 	/* This is really two different operations rolled into one */
 	args.out_numargs = 1;
 	if (size) {
-		args.out_argvar = 1;
+		args.out_argvar = true;
 		args.out_args[0].size = size;
 		args.out_args[0].value = list;
 	} else {