ext4: use current_time() for inode timestamps

CURRENT_TIME_SEC and CURRENT_TIME are not y2038 safe.
current_time() will be transitioned to be y2038 safe
along with vfs.

current_time() returns timestamps according to the
granularities set in the super_block.
The granularity check in ext4_current_time() to call
current_time() or CURRENT_TIME_SEC is not required.
Use current_time() directly to obtain timestamps
unconditionally, and remove ext4_current_time().

Quota files are assumed to be on the same filesystem.
Hence, use current_time() for these files as well.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index dfa5199..fd38993 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -196,7 +196,7 @@ __ext4_set_acl(handle_t *handle, struct inode *inode, int type,
 			error = posix_acl_update_mode(inode, &inode->i_mode, &acl);
 			if (error)
 				return error;
-			inode->i_ctime = ext4_current_time(inode);
+			inode->i_ctime = current_time(inode);
 			ext4_mark_inode_dirty(handle, inode);
 		}
 		break;