linux-kernel - Re: linux-next: build failure after merge of the block tree

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Message-ID: <CAMuHMdWMmP_YHEwnqmuTMw4-+LSieRaSHeqPLYLZyLq+O7zhyQ@mail.gmail.com>
Date:   Wed, 15 Jul 2020 11:24:32 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Jens Axboe <axboe@...nel.dk>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the block tree

On Wed, Jul 15, 2020 at 4:26 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> After merging the block tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
>
> block/blk-timeout.c: In function 'blk_round_jiffies':
> block/blk-timeout.c:96:14: error: 'CONFIG_HZ_ROUGH_MASK' undeclared (first use in this function)
>    96 |  return (j + CONFIG_HZ_ROUGH_MASK) + 1;
>       |              ^~~~~~~~~~~~~~~~~~~~
>
> Caused by commit
>
>   91ba0f529364 ("block: relax jiffies rounding for timeouts")
>
> CONFIG_HZ_ROUGH_MASK is not defined for this build even though
> CONFIG_HZ_100 is set. The arm arch does not include kernel/Kconfig.hz.
>
> I have reverted that commit for today.

(as I don't have the original patch in my email, I'm commenting here)

    +config HZ_ROUGH_MASK
    +       int
    +       default 127 if HZ_100
    +       default 255 if HZ_250 || HZ_300
    +       default 1023 if HZ_1000

What about other HZ_* values?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds