[PATCH v6 9/9] tmpfs: add support for multigrain timestamps

Jeff Layton
2024-07-15T12:49:36Z

Enable multigrain timestamps, which should ensure that there is an
apparent change to the timestamp whenever it has been written after
being actively observed via getattr.

tmpfs only requires the FS_MGTIME flag.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
mm/shmem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 7f2b609945a5..75a9a73a769f 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4660,7 +4660,7 @@ static struct file_system_type shmem_fs_type = {
.parameters = shmem_fs_parameters,
#endif
.kill_sb = kill_litter_super,
- .fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP,
+ .fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP | FS_MGTIME,
};

void __init shmem_init(void)

--
2.45.2