[PATCH 1/2] exfat: properly set s_time_gran

[Eric Sandeen <sandeen@xxxxxxxxxxx>]

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@xxxxxxxxxxx>
---

diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index 16ed202ef527..4f21bf8b550d 100644
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -541,7 +542,7 @@ 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 = 10000000;
 	sb->s_time_min = EXFAT_MIN_TIMESTAMP_SECS;
 	sb->s_time_max = EXFAT_MAX_TIMESTAMP_SECS;