From: Jeff Layton <jlayton@kernel.org> stable inclusion from linux-4.19.205 commit 6ce8ad137e3ad0ea20a55fdb8d9cfe01bd79a109 -------------------------------- [ Upstream commit fdd92b64d15bc4aec973caa25899afd782402e68 ] We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros have disabled it. Warn the stragglers that still use "-o mand" that we'll be dropping support for that mount option. Cc: stable@vger.kernel.org Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- fs/namespace.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/namespace.c b/fs/namespace.c index 2a16b5ee97cf7..237f12b4882ac 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1664,8 +1664,12 @@ static inline bool may_mount(void) } #ifdef CONFIG_MANDATORY_FILE_LOCKING -static inline bool may_mandlock(void) +static bool may_mandlock(void) { + pr_warn_once("======================================================\n" + "WARNING: the mand mount option is being deprecated and\n" + " will be removed in v5.15!\n" + "======================================================\n"); return capable(CAP_SYS_ADMIN); } #else -- 2.25.1