linux-kernel - drivers/clk/pxa/clk-pxa3xx.c:167:9: sparse: sparse: Using plain integer as NULL pointer

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Date:   Wed, 13 Jul 2022 02:56:22 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/clk/pxa/clk-pxa3xx.c:167:9: sparse: sparse: Using plain
 integer as NULL pointer

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   72a8e05d4f66b5af7854df4490e3135168694b6b
commit: 3c816d950a494ae6e16b1fa017af29bc53cb7791 ARM: pxa: move clk register definitions to driver
date:   9 weeks ago
config: arm-randconfig-s031-20220712 (https://download.01.org/0day-ci/archive/20220713/202207130219.0wWooaZN-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c816d950a494ae6e16b1fa017af29bc53cb7791
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 3c816d950a494ae6e16b1fa017af29bc53cb7791
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/mach-iop32x/ arch/arm/mach-mmp/ arch/arm/mach-mv78xx0/ arch/arm/mach-omap1/ arch/arm/mach-orion5x/ arch/arm/mach-spear/ arch/arm/mm/ drivers/clk/pxa/ drivers/clk/spear/ drivers/isdn/hardware/mISDN/ drivers/net/ethernet/google/gve/ drivers/scsi/ drivers/usb/host/ sound/soc/codecs/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/clk/pxa/clk-pxa3xx.c:167:9: sparse: sparse: Using plain integer as NULL pointer

vim +167 drivers/clk/pxa/clk-pxa3xx.c

   159	
   160	void pxa3xx_clk_update_accr(u32 disable, u32 enable, u32 xclkcfg, u32 mask)
   161	{
   162		u32 accr = readl(clk_regs + ACCR);
   163	
   164		accr &= ~disable;
   165		accr |= enable;
   166	
 > 167		writel(accr, ACCR);
   168		if (xclkcfg)
   169			__asm__("mcr p14, 0, %0, c6, c0, 0\n" : : "r"(xclkcfg));
   170	
   171		while ((readl(clk_regs + ACSR) & mask) != (accr & mask))
   172			cpu_relax();
   173	}
   174	

-- 
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https://01.org/lkp