Hi Danilo, [auto build test WARNING on input/next] [also build test WARNING on v4.13-rc3 next-20170731] [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/Danilo-Krummrich/serio-PS2-gpio-bit-banging-driver-for-the-serio-bus/20170801-081531 base: https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next config: blackfin-allyesconfig (attached as .config) compiler: bfin-uclinux-gcc (GCC) 6.2.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=blackfin Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): In file included from arch/blackfin/include/asm/gpio.h:191:0, from include/linux/gpio.h:48, from drivers/input/serio/ps2-gpio.c:11: drivers/input/serio/ps2-gpio.c: In function 'ps2_gpio_irq': >> include/asm-generic/gpio.h:103:9: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized] return gpiod_set_raw_value(gpio_to_desc(gpio), value); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/input/serio/ps2-gpio.c:191:6: note: 'data' was declared here int data; ^~~~ vim +/data +103 include/asm-generic/gpio.h d2876d08 David Brownell 2008-02-04 91 d2876d08 David Brownell 2008-02-04 92 d2876d08 David Brownell 2008-02-04 93 /* A platform's <asm/gpio.h> code may want to inline the I/O calls when d2876d08 David Brownell 2008-02-04 94 * the GPIO is constant and refers to some always-present controller, d2876d08 David Brownell 2008-02-04 95 * giving direct access to chip registers and tight bitbanging loops. d2876d08 David Brownell 2008-02-04 96 */ 79a9becd Alexandre Courbot 2013-10-17 97 static inline int __gpio_get_value(unsigned gpio) 79a9becd Alexandre Courbot 2013-10-17 98 { 79a9becd Alexandre Courbot 2013-10-17 99 return gpiod_get_raw_value(gpio_to_desc(gpio)); 79a9becd Alexandre Courbot 2013-10-17 100 } 79a9becd Alexandre Courbot 2013-10-17 101 static inline void __gpio_set_value(unsigned gpio, int value) 79a9becd Alexandre Courbot 2013-10-17 102 { 79a9becd Alexandre Courbot 2013-10-17 @103 return gpiod_set_raw_value(gpio_to_desc(gpio), value); 79a9becd Alexandre Courbot 2013-10-17 104 } d2876d08 David Brownell 2008-02-04 105 :::::: The code at line 103 was first introduced by commit :::::: 79a9becda8940deb2274b5aa4577c86d52ee7ecb gpiolib: export descriptor-based GPIO interface :::::: TO: Alexandre Courbot <acourbot@xxxxxxxxxx> :::::: CC: Linus Walleij <linus.walleij@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
Attachment:
.config.gz
Description: application/gzip
