linux-kernel - Re: [PATCH] mm, hugetlbfs: include mm.h for vm_operations

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Date:   Wed, 13 Dec 2017 11:36:57 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Michal Hocko <mhocko@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm, hugetlbfs: include mm.h for vm_operations_struct

Hi Dan,

On Tue, 12 Dec 2017 00:05:08 -0800 Dan Williams <dan.j.williams@...el.com> wrote:
>
> On Mon, Dec 11, 2017 at 11:47 PM, Michal Hocko <mhocko@...nel.org> wrote:
> > On Mon 11-12-17 17:21:27, Arnd Bergmann wrote:  
> >> The infiniband umem code causes a build failure in some configurations:
> >>
> >> In file included from drivers/infiniband/core/umem_odp.c:41:0:
> >> include/linux/hugetlb.h: In function 'vma_kernel_pagesize':
> >> include/linux/hugetlb.h:262:32: error: dereferencing pointer to incomplete type 'const struct vm_operations_struct'
> >>
> >> Including the header file that defines the structure is sufficient to
> >> avoid this.
> >>
> >> Fixes: ac9284a6b670 ("mm, hugetlbfs: introduce ->pagesize() to vm_operations_struct")
> >> Signed-off-by: Arnd Bergmann <arnd@...db.de>  
> >
> > I've tried to do the same but the compilation failed for other
> > arches/configs. See http://lkml.kernel.org/r/20171210113715.GE20234@dhcp22.suse.cz  
> 
> Andrew, Stephen, please drop this ->pagesize() patch out of -mm and
> -next. I'll circle back once I have this include dependency fixed up.
> Thanks for the reports and sorry for the noise.

I have removed commits:

  ac9284a6b670 ("mm, hugetlbfs: introduce ->pagesize() to vm_operations_struct")
  d8115c6f55a0 ("device-dax: implement ->pagesize() for smaps to report MMUPageSize")

from my copy of the mmotm tree from today.

-- 
Cheers,
Stephen Rothwell