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tmpfs: add support for multigrain timestamps
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: Jan Kara <jack@suse.cz> Signed-off-by: Jeff Layton <jlayton@kernel.org> Message-Id: <20230807-mgctime-v7-10-d1dec143a704@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
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@ -4220,7 +4220,7 @@ static struct file_system_type shmem_fs_type = {
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#endif
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.kill_sb = kill_litter_super,
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#ifdef CONFIG_SHMEM
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.fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP,
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.fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP | FS_MGTIME,
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#else
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.fs_flags = FS_USERNS_MOUNT,
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#endif
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