fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps

CURRENT_TIME_SEC is not y2038 safe. current_time() will
be transitioned to use 64 bit time along with vfs in a
separate patch.
There is no plan to transistion CURRENT_TIME_SEC to use
y2038 safe time interfaces.

current_time() will also be extended to use superblock
range checking parameters when range checking is introduced.

This works because alloc_super() fills in the the s_time_gran
in super block to NSEC_PER_SEC.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index b386af2..9d61742 100644
--- a/fs/ext2/ioctl.c
+++ b/fs/ext2/ioctl.c
@@ -79,7 +79,7 @@
 		ei->i_flags = flags;
 
 		ext2_set_inode_flags(inode);
-		inode->i_ctime = CURRENT_TIME_SEC;
+		inode->i_ctime = current_time(inode);
 		inode_unlock(inode);
 
 		mark_inode_dirty(inode);
@@ -103,7 +103,7 @@
 		}
 
 		inode_lock(inode);
-		inode->i_ctime = CURRENT_TIME_SEC;
+		inode->i_ctime = current_time(inode);
 		inode->i_generation = generation;
 		inode_unlock(inode);