ceph: return -EINVAL if given fsc mount option on kernel w/o support
If someone requests fscache on the mount, and the kernel doesn't support it, it should fail the mount. [ Drop ceph prefix -- it's provided by pr_err. ] Signed-off-by: NJeff Layton <jlayton@kernel.org> Reviewed-by: NIlya Dryomov <idryomov@gmail.com> Signed-off-by: NIlya Dryomov <idryomov@gmail.com>
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