The powerpc build failures noticed on Linux next-20240628 tag.

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

Regressions found on powerpc:

- gcc-13-maple_defconfig - gcc-13-cell_defconfig - clang-nightly-maple_defconfig - gcc-8-defconfig - gcc-8-tqm8xx_defconfig - clang-18-tqm8xx_defconfig - gcc-8-maple_defconfig - clang-nightly-cell_defconfig - clang-18-maple_defconfig - gcc-13-defconfig - clang-18-defconfig - clang-nightly-defconfig - gcc-13-tqm8xx_defconfig - clang-nightly-tqm8xx_defconfig - gcc-8-cell_defconfig - clang-18-cell_defconfig

Build error: --- mm/gup.c: In function 'gup_hugepte': mm/gup.c:525:25: error: implicit declaration of function 'try_grab_folio_fast'; did you mean 'try_grab_folio'? [-Werror=implicit-function-declaration] 525 | folio = try_grab_folio_fast(page, refs, flags); | ^~~~~~~~~~~~~~~~~~~ | try_grab_folio mm/gup.c:525:23: warning: assignment to 'struct folio *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 525 | folio = try_grab_folio_fast(page, refs, flags); | ^ mm/gup.c: At top level: mm/gup.c:2827:22: error: conflicting types for 'try_grab_folio_fast'; have 'struct folio *(struct page *, int, unsigned int)' 2827 | static struct folio *try_grab_folio_fast(struct page *page, int refs, | ^~~~~~~~~~~~~~~~~~~ mm/gup.c:525:25: note: previous implicit declaration of 'try_grab_folio_fast' with type 'int()' 525 | folio = try_grab_folio_fast(page, refs, flags); | ^~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors

Steps to reproduce: ----

# tuxmake --runtime podman --target-arch powerpc --toolchain gcc-13 --kconfig cell_defconfig

metadata: ---- git_describe: next-20240628 git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git_short_log: 1eb586a9782c ("Add linux-next specific files for 20240628") arch: powerpc toolchain: gcc-13 and clang-18

Links: - https://storage.tuxsuite.com/public/linaro/lkft/builds/2iWYcbTLGMcGuxl7caQ3j... - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240628/tes... - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240628/tes...

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