[patch 1/5] vfs: truncate: dont check immutable twice

vfs_permission(MAY_WRITE) already checked for the inode being
immutable, so no need to repeat it.
Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
Acked-by: NChristoph Hellwig <hch@infradead.org>

fs/open.c

@@ -256,7 +256,7 @@ static long do_sys_truncate(const char __user * path, loff_t length)
 		goto mnt_drop_write_and_out;
 
 	error = -EPERM;
-	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+	if (IS_APPEND(inode))
 		goto mnt_drop_write_and_out;
 
 	error = get_write_access(inode);