commit d2c828a32a3b019194051ee24607eafee517cc43
Author:     Niu Yawei <yawei.niu@intel.com>
AuthorDate: Mon Feb 9 22:21:00 2015 -0500
LU-6137 ldiskfs: simplify nocmtime patch

Simplify the nocmtime patch by patching only ext4_current_time(),
this fixed the defect that original patch doesn't handle setacl
code path, it can also avoid the risk of future changes adding
new places that needs to be fixed.

Remove the obsolete xattr-no-update-ctime patch.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Change-Id: I02928c4f867e9476f0bc1815dd3256e3d79dadf7
Reviewed-on: http://review.whamcloud.com/13705
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>

Index: linux-4.15.0/fs/ext4/ext4.h
===================================================================
--- linux-4.15.0.orig/fs/ext4/ext4.h
+++ linux-4.15.0/fs/ext4/ext4.h
@@ -655,6 +655,20 @@ enum {
 #define EXT4_GOING_FLAGS_LOGFLUSH		0x1	/* flush log but not data */
 #define EXT4_GOING_FLAGS_NOLOGFLUSH		0x2	/* don't flush log nor data */
 
+#define current_time(a) ext4_current_time(a)
+static inline struct timespec ext4_current_time(struct inode *inode)
+{
+	struct timespec now = current_kernel_time();
+
+	if (IS_NOCMTIME(inode))
+		return inode->i_ctime;
+
+	/* Copy from fs/inode.c */
+	if (unlikely(!inode->i_sb))
+		return now;
+
+	return timespec_trunc(now, inode->i_sb->s_time_gran);
+}
 
 #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
 /*