On Mon. 26 Apr 2021 at 01:45, Patrick Menschel <menschel.p@xxxxxxxxx> wrote:
>
> Am 25.04.21 um 17:35 schrieb Vincent MAILHOL:
> > On Sun. 26 Apr 2021 at 00:10, Patrick Menschel <menschel.p@xxxxxxxxx> wrote:
> > Speaking of comprehensive error messages, it would be great to
> > print the mnemotechnic of the error code instead of its value:
> > | pr_notice_once("can-isotp: %s: can_send_ret
> > %pe : tx queue is full\n",
> > | __func__, ERR_PTR(err));
> >
> Thanks Vincent,
>
> it's the first time I see this format string %pe , is it new or kernel
> specific?
Yes, this is fairly recent and it is kernel specific (and I love it).
It was added in commit 57f5677e535ba ("printf: add support for
printing symbolic error names").
Ref: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=57f5677e535ba24b8926a7125be2ef8d7f09323c
Yours sincerely,
Vincent
