Hi Fabrizio, I love your patch! Perhaps something to improve: [auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on robh/for-next renesas-drivers/renesas-clk renesas-devel/next v5.11 next-20210226] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Fabrizio-Castro/Add-FFT-Support-for-R-Car-Gen3-devices/20210226-065737 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 29c395c77a9a514c5857c45ceae2665e9bd99ac7 config: arm64-allyesconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 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/0day-ci/linux/commit/7f7ea7f057fde0d61b09f379dbd6abec9d00f713 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Fabrizio-Castro/Add-FFT-Support-for-R-Car-Gen3-devices/20210226-065737 git checkout 7f7ea7f057fde0d61b09f379dbd6abec9d00f713 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/misc/rcar_dab/rcar_dev.c:20:13: warning: no previous prototype for 'rcar_dab_irq' [-Wmissing-prototypes] 20 | irqreturn_t rcar_dab_irq(int irq, void *devid) | ^~~~~~~~~~~~ vim +/rcar_dab_irq +20 drivers/misc/rcar_dab/rcar_dev.c 19 > 20 irqreturn_t rcar_dab_irq(int irq, void *devid) 21 { 22 struct rcar_dab *dab = devid; 23 u32 intsr, intcr1; 24 25 spin_lock(&dab->shared_regs_lock); 26 27 intcr1 = rcar_dab_read(dab, RCAR_DAB_INTCR1); 28 rcar_dab_write(dab, RCAR_DAB_INTCR1, 0x000003FF); 29 30 intsr = rcar_dab_read(dab, RCAR_DAB_INTSR); 31 if (!intsr) { 32 rcar_dab_write(dab, RCAR_DAB_INTCR1, intcr1); 33 spin_unlock(&dab->shared_regs_lock); 34 return IRQ_NONE; 35 } 36 37 /* Re-enable interrupts that haven't fired */ 38 rcar_dab_write(dab, RCAR_DAB_INTCR1, 0x3FF & (intsr | intcr1)); 39 /* Clear interrupts */ 40 rcar_dab_write(dab, RCAR_DAB_INTSR, 0x7 & ~intsr); 41 42 spin_unlock(&dab->shared_regs_lock); 43 44 if (intsr & RCAR_DAB_INTSR_FFT_DONE) 45 rcar_dab_fft_irq(dab); 46 47 return IRQ_HANDLED; 48 } 49 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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