[next] mm/gup.c:96:10: error: implicit declaration of function 'is_zero_pfn' [-Werror,-Wimplicit-function-declaration]

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Linux next tag 20210202 arm, riscv and sh builds with allnoconfig and
tinyconfig failed due to build errors.


make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/1/tmp ARCH=arm
CROSS_COMPILE=arm-linux-gnueabihf- 'HOSTCC=sccache clang' 'CC=sccache
clang' zImage
 mm/gup.c:96:10: error: implicit declaration of function 'is_zero_pfn'
[-Werror,-Wimplicit-function-declaration]
                             !is_pinnable_page(page)))
                              ^
 include/linux/mm.h:1133:3: note: expanded from macro 'is_pinnable_page'
                is_zero_pfn(page_to_pfn(page)))
                ^
 mm/gup.c:96:10: note: did you mean 'is_zero_ino'?
 include/linux/mm.h:1133:3: note: expanded from macro 'is_pinnable_page'
                is_zero_pfn(page_to_pfn(page)))
                ^
 include/linux/fs.h:3045:20: note: 'is_zero_ino' declared here
static inline bool is_zero_ino(ino_t ino)
                   ^
1 error generated.

Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>

steps to reproduce:
--------------------------
# TuxMake is a command line tool and Python library that provides
# portable and repeatable Linux kernel builds across a variety of
# architectures, toolchains, kernel configurations, and make targets.
#
# TuxMake supports the concept of runtimes.
# See https://docs.tuxmake.org/runtimes/, for that to work it requires
# that you install podman or docker on your system.
#
# To install tuxmake on your system globally:
# sudo pip3 install -U tuxmake
#
# See https://docs.tuxmake.org/ for complete documentation.

tuxmake --runtime podman --target-arch arm --toolchain clang-11
--kconfig allnoconfig

build details:
https://builds.tuxbuild.com/1nv9wkY1T8wug0sEw2kwuFKLxhK/

Regressions found on sh:

   - build/gcc-10-allnoconfig
   - build/gcc-9-tinyconfig
   - build/gcc-8-allnoconfig
   - build/gcc-10-tinyconfig
   - build/gcc-9-allnoconfig
   - build/gcc-8-tinyconfig

Regressions found on riscv:

   - build/gcc-10-allnoconfig
   - build/clang-11-tinyconfig
   - build/clang-10-allnoconfig
   - build/clang-11-allnoconfig
   - build/gcc-9-tinyconfig
   - build/gcc-8-allnoconfig
   - build/gcc-10-tinyconfig
   - build/clang-10-tinyconfig
   - build/gcc-9-allnoconfig
   - build/gcc-8-tinyconfig

Regressions found on arm:

   - build/gcc-10-allnoconfig
   - build/clang-11-tinyconfig
   - build/clang-10-allnoconfig
   - build/clang-11-allnoconfig
   - build/gcc-9-tinyconfig
   - build/gcc-8-allnoconfig
   - build/gcc-10-tinyconfig
   - build/clang-10-tinyconfig
   - build/gcc-9-allnoconfig
   - build/gcc-8-tinyconfig


- Naresh



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