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

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Date:   Tue, 6 Sep 2022 05:05:32 -0700
From:   Rob Clark <robdclark@...omium.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Rob Clark <robdclark@...il.com>,
        Sean Paul <seanpaul@...omium.org>, NeilBrown <neilb@...e.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the mm tree

It looks like, at least for now, I can replace `sc->gfp_mask &
__GFP_ATOMIC` with `!(sc->gfp_mask & __GFP_DIRECT_RECLAIM)`.. I'm not
sure if there would be any cases where we could otherwise sleep but
__GFP_DIRECT_RECLAIM is not set?

BR,
-R

On Tue, Sep 6, 2022 at 4:03 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> After merging the mm tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
>
> drivers/gpu/drm/msm/msm_gem_shrinker.c: In function 'can_block':
> drivers/gpu/drm/msm/msm_gem_shrinker.c:29:28: error: '__GFP_ATOMIC' undeclared (first use in this function); did you mean 'GFP_ATOMIC'?
>    29 |         if (sc->gfp_mask & __GFP_ATOMIC)
>       |                            ^~~~~~~~~~~~
>       |                            GFP_ATOMIC
>
> Caused by commit
>
>   9178e3dcb121 ("mm: discard __GFP_ATOMIC")
>
> interacting with commit
>
>   025d27239a2f ("drm/msm/gem: Evict active GEM objects when necessary")
>
> from the drm-msm tree.
>
> I have reverted the drm-msm tree commit for today.
>
> --
> Cheers,
> Stephen Rothwell