From: hujianyang <hujianyang@huawei.com>
Date: Tue, 12 May 2015 08:05:57 +0000 (+0800)
Subject: f2fs: add compat_ioctl to provide backward compatability
X-Git-Tag: v4.2-rc1~123^2~34
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=08b95126c787441e4ef572422a5237dd985147be;p=karo-tx-linux.git

f2fs: add compat_ioctl to provide backward compatability

introduce compat_ioctl to regular files, but doesn't add this
functionality to f2fs_dir_operations.

While running a 32-bit busybox, I met an error like this:
(A is a directory)

chattr: reading flags on A: Inappropriate ioctl for device

This patch copies compat_ioctl from f2fs_file_operations and
fix this problem.

Signed-off-by: hujianyang <hujianyang@huawei.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 12f686914d38..3e923763daca 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -879,4 +879,7 @@ const struct file_operations f2fs_dir_operations = {
 	.iterate	= f2fs_readdir,
 	.fsync		= f2fs_sync_file,
 	.unlocked_ioctl	= f2fs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl   = f2fs_compat_ioctl,
+#endif
 };