tree: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git testing head: 49be30ad801804ba0ba0051eefd61f2ce74060d7 commit: 78379c9664cf4c92b7789d04d4dcc8714edb8385 [20/38] iio: dac: ad5624r: Fix incorrect handling of an optional regulator. config: i386-randconfig-a014-20210718 (attached as .config) compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git/commit/?id=... git remote add iio https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git git fetch --no-tags iio testing git checkout 78379c9664cf4c92b7789d04d4dcc8714edb8385 # save the attached .config to linux build tree make W=1 ARCH=i386 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/iio/dac/ad5624r_spi.c: In function 'ad5624r_probe': drivers/iio/dac/ad5624r_spi.c:296:12: error: invalid storage class for function 'ad5624r_remove' 296 | static int ad5624r_remove(struct spi_device *spi) | ^~~~~~~~~~~~~~ >> drivers/iio/dac/ad5624r_spi.c:296:1: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 296 | static int ad5624r_remove(struct spi_device *spi) | ^~~~~~ drivers/iio/dac/ad5624r_spi.c:324:12: error: initializer element is not constant 324 | .remove = ad5624r_remove, | ^~~~~~~~~~~~~~ drivers/iio/dac/ad5624r_spi.c:324:12: note: (near initialization for 'ad5624r_driver.remove') drivers/iio/dac/ad5624r_spi.c:319:1: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 319 | static struct spi_driver ad5624r_driver = { | ^~~~~~ In file included from include/linux/device.h:32, from drivers/iio/dac/ad5624r_spi.c:10: drivers/iio/dac/ad5624r_spi.c:327:19: error: invalid storage class for function 'ad5624r_driver_init' 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~ include/linux/device/driver.h:259:19: note: in definition of macro 'module_driver' 259 | static int __init __driver##_init(void) \ | ^~~~~~~~ drivers/iio/dac/ad5624r_spi.c:327:1: note: in expansion of macro 'module_spi_driver' 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~~~~ In file included from include/linux/export.h:43, from include/linux/linkage.h:7, from include/linux/kernel.h:8, from include/linux/interrupt.h:6, from drivers/iio/dac/ad5624r_spi.c:8: include/linux/compiler.h:242:46: error: initializer element is not constant 242 | __UNIQUE_ID(__PASTE(__addressable_,sym)) = (void *)&sym; | ^ include/linux/init.h:236:2: note: in expansion of macro '__ADDRESSABLE' 236 | __ADDRESSABLE(fn) | ^~~~~~~~~~~~~ include/linux/init.h:241:2: note: in expansion of macro '__define_initcall_stub' 241 | __define_initcall_stub(__stub, fn) \ | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/init.h:254:2: note: in expansion of macro '____define_initcall' 254 | ____define_initcall(fn, \ | ^~~~~~~~~~~~~~~~~~~ include/linux/init.h:260:2: note: in expansion of macro '__unique_initcall' 260 | __unique_initcall(fn, id, __sec, __initcall_id(fn)) | ^~~~~~~~~~~~~~~~~ include/linux/init.h:262:35: note: in expansion of macro '___define_initcall' 262 | #define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id) | ^~~~~~~~~~~~~~~~~~ include/linux/init.h:291:30: note: in expansion of macro '__define_initcall' 291 | #define device_initcall(fn) __define_initcall(fn, 6) | ^~~~~~~~~~~~~~~~~ include/linux/init.h:296:24: note: in expansion of macro 'device_initcall' 296 | #define __initcall(fn) device_initcall(fn) | ^~~~~~~~~~~~~~~ include/linux/module.h:88:24: note: in expansion of macro '__initcall' 88 | #define module_init(x) __initcall(x); | ^~~~~~~~~~ include/linux/device/driver.h:263:1: note: in expansion of macro 'module_init' 263 | module_init(__driver##_init); \ | ^~~~~~~~~~~ include/linux/spi/spi.h:317:2: note: in expansion of macro 'module_driver' 317 | module_driver(__spi_driver, spi_register_driver, \ | ^~~~~~~~~~~~~ drivers/iio/dac/ad5624r_spi.c:327:1: note: in expansion of macro 'module_spi_driver' 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~~~~ In file included from include/linux/bits.h:22, from include/linux/bitops.h:6, from include/linux/kernel.h:12, from include/linux/interrupt.h:6, from drivers/iio/dac/ad5624r_spi.c:8: >> include/linux/build_bug.h:78:41: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) | ^~~~~~~~~~~~~~ include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert' 77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) | ^~~~~~~~~~~~~~~ include/linux/init.h:246:2: note: in expansion of macro 'static_assert' 246 | static_assert(__same_type(initcall_t, &fn)); | ^~~~~~~~~~~~~ include/linux/init.h:254:2: note: in expansion of macro '____define_initcall' 254 | ____define_initcall(fn, \ | ^~~~~~~~~~~~~~~~~~~ include/linux/init.h:260:2: note: in expansion of macro '__unique_initcall' 260 | __unique_initcall(fn, id, __sec, __initcall_id(fn)) | ^~~~~~~~~~~~~~~~~ include/linux/init.h:262:35: note: in expansion of macro '___define_initcall' 262 | #define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id) | ^~~~~~~~~~~~~~~~~~ include/linux/init.h:291:30: note: in expansion of macro '__define_initcall' 291 | #define device_initcall(fn) __define_initcall(fn, 6) | ^~~~~~~~~~~~~~~~~ include/linux/init.h:296:24: note: in expansion of macro 'device_initcall' 296 | #define __initcall(fn) device_initcall(fn) | ^~~~~~~~~~~~~~~ include/linux/module.h:88:24: note: in expansion of macro '__initcall' 88 | #define module_init(x) __initcall(x); | ^~~~~~~~~~ include/linux/device/driver.h:263:1: note: in expansion of macro 'module_init' 263 | module_init(__driver##_init); \ | ^~~~~~~~~~~ include/linux/spi/spi.h:317:2: note: in expansion of macro 'module_driver' 317 | module_driver(__spi_driver, spi_register_driver, \ | ^~~~~~~~~~~~~ drivers/iio/dac/ad5624r_spi.c:327:1: note: in expansion of macro 'module_spi_driver' 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~~~~ In file included from include/linux/device.h:32, from drivers/iio/dac/ad5624r_spi.c:10: drivers/iio/dac/ad5624r_spi.c:327:19: error: invalid storage class for function 'ad5624r_driver_exit' 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~ include/linux/device/driver.h:264:20: note: in definition of macro 'module_driver' 264 | static void __exit __driver##_exit(void) \ | ^~~~~~~~ drivers/iio/dac/ad5624r_spi.c:327:1: note: in expansion of macro 'module_spi_driver' 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~~~~ >> include/linux/device/driver.h:264:1: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 264 | static void __exit __driver##_exit(void) \ | ^~~~~~ include/linux/spi/spi.h:317:2: note: in expansion of macro 'module_driver' 317 | module_driver(__spi_driver, spi_register_driver, \ | ^~~~~~~~~~~~~ drivers/iio/dac/ad5624r_spi.c:327:1: note: in expansion of macro 'module_spi_driver' 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~~~~ In file included from include/linux/printk.h:6, from include/linux/kernel.h:19, from include/linux/interrupt.h:6, from drivers/iio/dac/ad5624r_spi.c:8: drivers/iio/dac/ad5624r_spi.c:327:19: error: initializer element is not constant 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~ include/linux/init.h:299:50: note: in definition of macro '__exitcall' 299 | static exitcall_t __exitcall_##fn __exit_call = fn | ^~ include/linux/device/driver.h:268:1: note: in expansion of macro 'module_exit' 268 | module_exit(__driver##_exit); | ^~~~~~~~~~~ include/linux/spi/spi.h:317:2: note: in expansion of macro 'module_driver' 317 | module_driver(__spi_driver, spi_register_driver, \ | ^~~~~~~~~~~~~ drivers/iio/dac/ad5624r_spi.c:327:1: note: in expansion of macro 'module_spi_driver' 327 | module_spi_driver(ad5624r_driver); | ^~~~~~~~~~~~~~~~~ In file included from include/linux/module.h:22, from include/linux/bpf.h:19, from include/linux/bpf-cgroup.h:5, from include/linux/cgroup-defs.h:22, from include/linux/cgroup.h:28, from include/linux/memcontrol.h:13, from include/linux/swap.h:9, from include/linux/suspend.h:5, from include/linux/regulator/consumer.h:35, from drivers/iio/dac/ad5624r_spi.c:15: >> include/linux/moduleparam.h:24:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 24 | static const char __UNIQUE_ID(name)[] \ | ^~~~~~ include/linux/module.h:166:32: note: in expansion of macro '__MODULE_INFO' 166 | #define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info) | ^~~~~~~~~~~~~ include/linux/module.h:236:32: note: in expansion of macro 'MODULE_INFO' 236 | #define MODULE_AUTHOR(_author) MODULE_INFO(author, _author) | ^~~~~~~~~~~ drivers/iio/dac/ad5624r_spi.c:329:1: note: in expansion of macro 'MODULE_AUTHOR' 329 | MODULE_AUTHOR("Barry Song <21cnbao(a)gmail.com&gt;&quot;); | ^~~~~~~~~~~~~ drivers/iio/dac/ad5624r_spi.c:331:1: error: expected declaration or statement at end of input 331 | MODULE_LICENSE("GPL v2"); | ^~~~~~~~~~~~~~ At top level: drivers/iio/dac/ad5624r_spi.c:222:12: warning: 'ad5624r_probe' defined but not used [-Wunused-function] 222 | static int ad5624r_probe(struct spi_device *spi) | ^~~~~~~~~~~~~ vim +296 drivers/iio/dac/ad5624r_spi.c 6790e29fef61b2 drivers/staging/iio/dac/ad5624r_spi.c Barry Song 2010-10-27 295 fc52692c49969e drivers/iio/dac/ad5624r_spi.c Greg Kroah-Hartman 2012-12-21 @296 static int ad5624r_remove(struct spi_device *spi) 6790e29fef61b2 drivers/staging/iio/dac/ad5624r_spi.c Barry Song 2010-10-27 297 { 3ff242055b7b46 drivers/staging/iio/dac/ad5624r_spi.c Jonathan Cameron 2011-06-27 298 struct iio_dev *indio_dev = spi_get_drvdata(spi); 3ff242055b7b46 drivers/staging/iio/dac/ad5624r_spi.c Jonathan Cameron 2011-06-27 299 struct ad5624r_state *st = iio_priv(indio_dev); 3ff242055b7b46 drivers/staging/iio/dac/ad5624r_spi.c Jonathan Cameron 2011-06-27 300 d2fffd6c2fd60f drivers/staging/iio/dac/ad5624r_spi.c Jonathan Cameron 2011-10-14 301 iio_device_unregister(indio_dev); 75238230cce22b drivers/iio/dac/ad5624r_spi.c Sachin Kamat 2013-08-19 302 if (!IS_ERR(st->reg)) 26a54797c1b094 drivers/staging/iio/dac/ad5624r_spi.c Jonathan Cameron 2011-08-30 303 regulator_disable(st->reg); 14f88f1b07e03b drivers/staging/iio/dac/ad5624r_spi.c Michael Hennerich 2011-03-09 304 6790e29fef61b2 drivers/staging/iio/dac/ad5624r_spi.c Barry Song 2010-10-27 305 return 0; 6790e29fef61b2 drivers/staging/iio/dac/ad5624r_spi.c Barry Song 2010-10-27 306 } 6790e29fef61b2 drivers/staging/iio/dac/ad5624r_spi.c Barry Song 2010-10-27 307 :::::: The code at line 296 was first introduced by commit :::::: fc52692c49969ec72595766929b9f54ac402da34 Drivers: iio: remove __dev* attributes. :::::: TO: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt; :::::: CC: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org