linux-kernel - next: mm/khugepaged.c:1702:30: error: implicit declaration of function 'vma_try_start_write'; did you mean 'vma_start_write'? [-Werror=implicit-function-declaration]

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Date:   Mon, 6 Mar 2023 16:43:01 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        lkft-triage@...ts.linaro.org, linux-mm <linux-mm@...ck.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Xu <peterx@...hat.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>
Subject: next: mm/khugepaged.c:1702:30: error: implicit declaration of
 function 'vma_try_start_write'; did you mean 'vma_start_write'? [-Werror=implicit-function-declaration]

Following build regression noticed on i386, mips and s390.

mm/khugepaged.c: In function 'retract_page_tables':
mm/khugepaged.c:1702:30: error: implicit declaration of function
'vma_try_start_write'; did you mean 'vma_start_write'?
[-Werror=implicit-function-declaration]
 1702 |                         if (!vma_try_start_write(vma))
      |                              ^~~~~~~~~~~~~~~~~~~
      |                              vma_start_write
cc1: all warnings being treated as errors

build details:
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230306/testrun/15286608/suite/build/test/gcc-11-lkftconfig-rcutorture/details/
- https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230306/testrun/15286608/suite/build/test/gcc-11-lkftconfig-rcutorture/log

# To install tuxmake on your system globally:
# sudo pip3 install -U tuxmake
#

tuxmake --runtime podman \
         --target-arch i386 \
         --toolchain gcc-12 \
         --kconfig
https://storage.tuxsuite.com/public/linaro/lkft/builds/2McWOXP1OH5MiYficVNv8hJCR4F/config

Similar issues have been reported and discussed on the mailing list.
- https://lore.kernel.org/all/20230305191335.fee8e6aa285b0ca771cab9dd@linux-foundation.org/

--
Linaro LKFT
https://lkft.linaro.org