[kbuild-all] [linux-chenxing:mstar_v5_14_rebase 137/352] drivers/crypto/mstar/msc313-rsa.c:131:34: warning: passing argument 3 of 'msc313_rsa_write_memory' discards 'volatile' qualifier from pointer target type

tree: git://github.com/linux-chenxing/linux.git mstar_v5_14_rebase head: 651efd0e52f225e60faa8b30f9768021e2104d3c commit: cbe9cdba7d664459a2da9c99039edc76c578fb50 [137/352] crypto: mstar: RSA config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0 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/linux-chenxing/linux/commit/cbe9cdba7d664459a2da9c9903... git remote add linux-chenxing git://github.com/linux-chenxing/linux.git git fetch --no-tags linux-chenxing mstar_v5_14_rebase git checkout cbe9cdba7d664459a2da9c99039edc76c578fb50 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/crypto/mstar/msc313-rsa.c: In function 'msc313_rsa_irq': drivers/crypto/mstar/msc313-rsa.c:57:21: warning: unused variable 'rsa' [-Wunused-variable] 57 | struct msc313_rsa *rsa = data; | ^~~ drivers/crypto/mstar/msc313-rsa.c: In function 'msc313_rsa_test': 131 | msc313_rsa_write_memory(rsa, 0, test_in, ARRAY_SIZE(test_in)); | ^~~~~~~ drivers/crypto/mstar/msc313-rsa.c:61:80: note: expected 'const u8 *' {aka 'const unsigned char *'} but argument is of type 'volatile u8 *' {aka 'volatile unsigned char *'} 61 | static int msc313_rsa_write_memory(struct msc313_rsa *rsa, u16 addr, const u8 *buffer, unsigned int len) | ~~~~~~~~~~^~~~~~ 133 | msc313_rsa_read_memory(rsa, 0, test_out, ARRAY_SIZE(test_out)); | ^~~~~~~~ drivers/crypto/mstar/msc313-rsa.c:83:73: note: expected 'u8 *' {aka 'unsigned char *'} but argument is of type 'volatile u8 *' {aka 'volatile unsigned char *'} 83 | static int msc313_rsa_read_memory(struct msc313_rsa *rsa, u16 addr, u8 *buffer, unsigned int len) | ~~~~^~~~~~ drivers/crypto/mstar/msc313-rsa.c: In function 'msc313_rsa_probe': drivers/crypto/mstar/msc313-rsa.c:144:14: warning: unused variable 'irq' [-Wunused-variable] 144 | int i, ret, irq; | ^~~ drivers/crypto/mstar/msc313-rsa.c:144:9: warning: unused variable 'ret' [-Wunused-variable] 144 | int i, ret, irq; | ^~~ drivers/crypto/mstar/msc313-rsa.c:144:6: warning: unused variable 'i' [-Wunused-variable] 144 | int i, ret, irq; | ^ At top level: drivers/crypto/mstar/msc313-rsa.c:55:20: warning: 'msc313_rsa_irq' defined but not used [-Wunused-function] 55 | static irqreturn_t msc313_rsa_irq(int irq, void *data) | ^~~~~~~~~~~~~~ vim +131 drivers/crypto/mstar/msc313-rsa.c 116 117 118 static void msc313_rsa_test(struct msc313_rsa *rsa) 119 { 120 u8 i; 121 122 regmap_field_write(rsa->reset, 1); 123 clk_prepare_enable(rsa->clk); 124 mdelay(10); 125 regmap_field_write(rsa->reset, 0); 126 mdelay(10); 127 128 for(i = 0; i < ARRAY_SIZE(test_in); i++) 129 test_in[i] = ~i; 130 132 134 135 for(i = 0; i < ARRAY_SIZE(test_in); i++) 136 printk("rsa: %d %x:%x\n", (int)i, (unsigned) test_in[i], (unsigned) test_out[i]); 137 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org