From: Jeff Layton
> Sent: 20 August 2021 14:57
>
> 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: sta...@vger.kernel.org
> Signed-off-by: Jeff Layton <jlay...@kernel.org>
> ---
> fs/namespace.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/fs/namespace.c b/fs/namespace.c
> index ab4174a3c802..ffab0bb1e649 100644
> --- a/fs/namespace.c
> +++ b/fs/namespace.c
> @@ -1716,8 +1716,16 @@ static inline bool may_mount(void)
> }
>
> #ifdef CONFIG_MANDATORY_FILE_LOCKING
> +static bool warned_mand;
> static inline bool may_mandlock(void)
> {
> + if (!warned_mand) {
> + warned_mand = true;
> +
> pr_warn("======================================================\n");
> + pr_warn("WARNING: the mand mount option is being deprecated
> and\n");
> + pr_warn(" will be removed in v5.15!\n");
> +
> pr_warn("======================================================\n");
> + }
> return capable(CAP_SYS_ADMIN);
> }
If that is called more than once you don't want the 'inline'.
I doubt it matters is not inlined - hardly a hot path.
David
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