Hi William, I love your patch! Yet something to improve: [auto build test ERROR on v4.16-rc4] [also build test ERROR on next-20180316] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/William-Breathitt-Gray/Implement-get_multiple-for-ACCES-and-PC-104-drivers/20180317-224135 config: i386-randconfig-a0-201810 (attached as .config) compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): drivers/gpio/gpio-104-dio-48e.c: In function 'dio48e_gpio_get_multiple': >> drivers/gpio/gpio-104-dio-48e.c:214:3: error: 'word_mask' undeclared (first use in this function) word_mask = mask[word_index] & (port_mask << word_offset); ^ drivers/gpio/gpio-104-dio-48e.c:214:3: note: each undeclared identifier is reported only once for each function it appears in drivers/gpio/gpio-104-dio-48e.c:195:16: warning: unused variable 'mask_word' [-Wunused-variable] unsigned long mask_word; ^ vim +/word_mask +214 drivers/gpio/gpio-104-dio-48e.c 184 185 static int dio48e_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, 186 unsigned long *bits) 187 { 188 struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip); 189 size_t i; 190 const size_t ports[] = { 0, 1, 2, 4, 5, 6 }; 191 const unsigned int gpio_reg_size = 8; 192 unsigned int bits_offset; 193 size_t word_index; 194 unsigned int word_offset; 195 unsigned long mask_word; 196 const unsigned long port_mask = GENMASK(gpio_reg_size, 0); 197 unsigned long port_state; 198 199 /* clear bits array to a clean slate */ 200 bitmap_zero(bits, chip->ngpio); 201 202 /* get bits are evaluated a gpio port register at a time */ 203 for (i = 0; i < ARRAY_SIZE(ports); i++) { 204 /* gpio offset in bits array */ 205 bits_offset = i * gpio_reg_size; 206 207 /* word index for bits array */ 208 word_index = BIT_WORD(bits_offset); 209 210 /* gpio offset within current word of bits array */ 211 word_offset = bits_offset % BITS_PER_LONG; 212 213 /* mask of get bits for current gpio within current word */ > 214 word_mask = mask[word_index] & (port_mask << word_offset); 215 if (!word_mask) { 216 /* no get bits in this port so skip to next one */ 217 continue; 218 } 219 220 /* read bits from current gpio port */ 221 port_state = inb(dio48egpio->base + ports[i]); 222 223 /* store acquired bits at respective bits array offset */ 224 bits[word_index] |= port_state << word_offset; 225 } 226 227 return 0; 228 } 229 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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