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