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tmpfs: add support for multigrain timestamps

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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>
Reviewed-by: Jan Kara <jack@suse.cz>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # documentation bits
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/20241002-mgtime-v10-12-d1c4717f5284@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Jeff Layton 2024-10-02 17:27:27 -04:00 committed by Christian Brauner
parent e2e801d6e6
commit 234d8895e3
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1 changed files with 1 additions and 1 deletions
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mm/shmem.c
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@ -4804,7 +4804,7 @@ 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)