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    Subject[esmil:visionfive 64/80] drivers/gpu/drm/starfive/starfive_drm_vpp.c:602:9: error: implicit declaration of function 'sifive_l2_flush64_range'
    tree:   https://github.com/esmil/linux visionfive
    head: e46c3a7e373e6faa03399f1a41c29cf7546c37cb
    commit: 1eb3575230496368002bc06d59b7d219c09af47b [64/80] drm/starfive: Add StarFive drm driver
    config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220119/202201191349.mJZAPYfE-lkp@intel.com/config)
    compiler: arceb-elf-gcc (GCC) 11.2.0
    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
    # https://github.com/esmil/linux/commit/1eb3575230496368002bc06d59b7d219c09af47b
    git remote add esmil https://github.com/esmil/linux
    git fetch --no-tags esmil visionfive
    git checkout 1eb3575230496368002bc06d59b7d219c09af47b
    # save the config file to linux build tree
    mkdir build_dir
    COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash

    If you fix the issue, kindly add following tag as appropriate
    Reported-by: kernel test robot <lkp@intel.com>

    All errors (new ones prefixed by >>):

    drivers/gpu/drm/starfive/starfive_drm_vpp.c: In function 'vpp1_isr_handler':
    >> drivers/gpu/drm/starfive/starfive_drm_vpp.c:602:9: error: implicit declaration of function 'sifive_l2_flush64_range' [-Werror=implicit-function-declaration]
    602 | sifive_l2_flush64_range(sf_crtc->dma_addr, sf_crtc->size);
    | ^~~~~~~~~~~~~~~~~~~~~~~
    drivers/gpu/drm/starfive/starfive_drm_vpp.c:598:13: warning: variable 'intr_status' set but not used [-Wunused-but-set-variable]
    598 | u32 intr_status = 0;
    | ^~~~~~~~~~~
    cc1: some warnings being treated as errors


    vim +/sifive_l2_flush64_range +602 drivers/gpu/drm/starfive/starfive_drm_vpp.c

    594
    595 irqreturn_t vpp1_isr_handler(int this_irq, void *dev_id)
    596 {
    597 struct starfive_crtc *sf_crtc = dev_id;
    598 u32 intr_status = 0;
    599
    600 intr_status = sf_fb_vppread32(sf_crtc, 1, PP_INT_STATUS);
    601 sf_fb_vppwrite32(sf_crtc, 1, PP_INT_CLR, 0xf);
    > 602 sifive_l2_flush64_range(sf_crtc->dma_addr, sf_crtc->size);
    603
    604 return IRQ_HANDLED;
    605 }
    606

    ---
    0-DAY CI Kernel Test Service, Intel Corporation
    https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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