From 674a9985b8e35288225f2b67829a7dee3bf761da Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sandeen@sandeen.net>
Date: Fri, 17 Apr 2020 14:43:49 +0900
Subject: [Backport 674a9985b8e3] exfat: properly set s_time_gran

The s_time_gran superblock field indicates the on-disk nanosecond
granularity of timestamps, and for exfat that seems to be 10ms, so
set s_time_gran to 10000000ns. Without this, in-memory timestamps
change when they get re-read from disk.

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
---
 src/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/super.c b/src/super.c
index cb5eac38102d92d9312667fdaa722f6a00d2ad16..ee42ecf59059a6c9bf61f5b6ec19efde21a4d897 100644
--- a/src/super.c
+++ b/src/super.c
@@ -529,7 +529,7 @@ static int exfat_fill_super(struct super_block *sb, struct fs_context *fc)
 	sb->s_magic = EXFAT_SUPER_MAGIC;
 	sb->s_op = &exfat_sops;
 
-	sb->s_time_gran = 1;
+	sb->s_time_gran = 10 * NSEC_PER_MSEC;
 	sb->s_time_min = EXFAT_MIN_TIMESTAMP_SECS;
 	sb->s_time_max = EXFAT_MAX_TIMESTAMP_SECS;
 
-- 
2.31.1