Re: [PATCH 00/12] Clang -Wformat warning fixes

[Bill Wendling]

On Thu, Jun 9, 2022 at 4:03 PM Jan Engelhardt <jengelh@xxxxxxx> wrote:
> On Friday 2022-06-10 00:49, Bill Wendling wrote:
> >On Thu, Jun 9, 2022 at 3:25 PM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> >> On Thu,  9 Jun 2022 22:16:19 +0000 Bill Wendling <morbo@xxxxxxxxxx> wrote:
> >>
> >> > This patch set fixes some clang warnings when -Wformat is enabled.
> >>
> >> tldr:
> >>
> >> -       printk(msg);
> >> +       printk("%s", msg);
> >>
> >> Otherwise these changes are a
> >> useless consumer of runtime resources.
> >
> >Calling a "printf" style function is already insanely expensive.
> >[...]
> >The "printk" and similar functions all have the "__printf" attribute.
> >I don't know of a modification to that attribute which can turn off
> >this type of check.
>
> Perhaps you can split vprintk_store in the middle (after the call to
> vsnprintf), and offer the second half as a function of its own (e.g.
> "puts"). Then the tldr could be
>
> - printk(msg);
> + puts(msg);

That might be a nice compromise. Andrew, what do you think?

-bw