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    SubjectRe: [kbuild-all] Re: drivers/net/wan/slic_ds26522.c:205:12: warning: stack frame size of 12288 bytes in function 'slic_ds26522_probe'
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    On 11/23/20 10:15 PM, Andrey Konovalov wrote:
    > On Thu, Nov 19, 2020 at 11:16 PM kernel test robot <lkp@intel.com> wrote:
    >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
    >> head: 3494d58865ad4a47611dbb427b214cc5227fa5eb
    >> commit: cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4 kasan: allow enabling stack tagging for tag-based mode
    >> date: 3 months ago
    >> config: arm64-randconfig-r002-20201119 (attached as .config)
    >> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b2613fb2f0f53691dd0211895afbb9413457fca7)
    >> reproduce (this is a W=1 build):
    >> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
    >> chmod +x ~/bin/make.cross
    >> # install arm64 cross compiling tool for clang build
    >> # apt-get install binutils-aarch64-linux-gnu
    >> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4
    >> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
    >> git fetch --no-tags linus master
    >> git checkout cae9dc35ed9ff82a99754e51d57ff6c332e1f7e4
    >> # save the attached .config to linux build tree
    >> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64
    >>
    >> If you fix the issue, kindly add following tag as appropriate
    >> Reported-by: kernel test robot <lkp@intel.com>
    >>
    >> All warnings (new ones prefixed by >>):
    >>
    >>>> drivers/net/wan/slic_ds26522.c:205:12: warning: stack frame size of 12288 bytes in function 'slic_ds26522_probe' [-Wframe-larger-than=]
    >> static int slic_ds26522_probe(struct spi_device *spi)
    >> ^
    >> 1 warning generated.
    >> --
    >>>> drivers/gpu/drm/panel/panel-sitronix-st7789v.c:194:12: warning: stack frame size of 18352 bytes in function 'st7789v_prepare' [-Wframe-larger-than=]
    >> static int st7789v_prepare(struct drm_panel *panel)
    >> ^
    >> 1 warning generated.
    > Same issue as reported previously. Copying my response from the other
    > email just in case:
    >
    > This is the same issue in LLVM that was reported by Arnd for generic
    > KASAN (also see KASAN_STACK_ENABLE option description). By default
    > KASAN shouldn't have stack instrumentation enabled unless
    > KASAN_STACK_ENABLE is specified. Perhaps it makes sense to disable it
    > for KASAN_SW_TAGS config on the kernel test robot.
    >
    > [1] https://bugs.llvm.org/show_bug.cgi?id=38809

    Hi Andrey,

    Thanks for the explanation, we'll disable CONFIG_KASAN_SW_TAGS.

    Best Regards,
    Rong Chen

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