Hi Saurabh, Thank you for the patch! Yet something to improve: [auto build test ERROR on char-misc/char-misc-testing] [also build test ERROR on linus/master v6.0 next-20221012] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Saurabh-Sengar/uio_hv_generic-Enable-support-for-slower-vmbus-device-channels/20221012-195731 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 49da070062390094112b423ba443ea193527b2e4 config: i386-randconfig-a005 compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/e7d62290b320f0f50c4f09b8f869b9049ef2c2bd git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Saurabh-Sengar/uio_hv_generic-Enable-support-for-slower-vmbus-device-channels/20221012-195731 git checkout e7d62290b320f0f50c4f09b8f869b9049ef2c2bd # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): In file included from include/linux/module.h:22, from include/linux/device/driver.h:21, from include/linux/device.h:32, from drivers/uio/uio_hv_generic.c:22: drivers/uio/uio_hv_generic.c: In function '__check_recv_buf_size': >> include/linux/moduleparam.h:150:34: error: returning 'size_t *' {aka 'unsigned int *'} from a function with incompatible return type 'long unsigned int *' [-Werror=incompatible-pointer-types] 150 | param_check_##type(name, &(value)); \ | ^ include/linux/moduleparam.h:409:75: note: in definition of macro '__param_check' 409 | static inline type __always_unused *__check_##name(void) { return(p); } | ^ include/linux/moduleparam.h:150:9: note: in expansion of macro 'param_check_ulong' 150 | param_check_##type(name, &(value)); \ | ^~~~~~~~~~~~ include/linux/moduleparam.h:127:9: note: in expansion of macro 'module_param_named' 127 | module_param_named(name, name, type, perm) | ^~~~~~~~~~~~~~~~~~ drivers/uio/uio_hv_generic.c:44:1: note: in expansion of macro 'module_param' 44 | module_param(recv_buf_size, ulong, 0644); | ^~~~~~~~~~~~ drivers/uio/uio_hv_generic.c: In function '__check_send_buf_size': >> include/linux/moduleparam.h:150:34: error: returning 'size_t *' {aka 'unsigned int *'} from a function with incompatible return type 'long unsigned int *' [-Werror=incompatible-pointer-types] 150 | param_check_##type(name, &(value)); \ | ^ include/linux/moduleparam.h:409:75: note: in definition of macro '__param_check' 409 | static inline type __always_unused *__check_##name(void) { return(p); } | ^ include/linux/moduleparam.h:150:9: note: in expansion of macro 'param_check_ulong' 150 | param_check_##type(name, &(value)); \ | ^~~~~~~~~~~~ include/linux/moduleparam.h:127:9: note: in expansion of macro 'module_param_named' 127 | module_param_named(name, name, type, perm) | ^~~~~~~~~~~~~~~~~~ drivers/uio/uio_hv_generic.c:48:1: note: in expansion of macro 'module_param' 48 | module_param(send_buf_size, ulong, 0644); | ^~~~~~~~~~~~ drivers/uio/uio_hv_generic.c: In function '__check_ring_size': >> include/linux/moduleparam.h:150:34: error: returning 'size_t *' {aka 'unsigned int *'} from a function with incompatible return type 'long unsigned int *' [-Werror=incompatible-pointer-types] 150 | param_check_##type(name, &(value)); \ | ^ include/linux/moduleparam.h:409:75: note: in definition of macro '__param_check' 409 | static inline type __always_unused *__check_##name(void) { return(p); } | ^ include/linux/moduleparam.h:150:9: note: in expansion of macro 'param_check_ulong' 150 | param_check_##type(name, &(value)); \ | ^~~~~~~~~~~~ include/linux/moduleparam.h:127:9: note: in expansion of macro 'module_param_named' 127 | module_param_named(name, name, type, perm) | ^~~~~~~~~~~~~~~~~~ drivers/uio/uio_hv_generic.c:52:1: note: in expansion of macro 'module_param' 52 | module_param(ring_size, ulong, 0644); | ^~~~~~~~~~~~ In file included from include/linux/printk.h:566, from include/linux/kernel.h:29, from arch/x86/include/asm/percpu.h:27, from arch/x86/include/asm/current.h:6, from include/linux/sched.h:12, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from drivers/uio/uio_hv_generic.c:22: drivers/uio/uio_hv_generic.c: In function 'hv_uio_probe': drivers/uio/uio_hv_generic.c:256:31: warning: format '%lx' expects argument of type 'long unsigned int', but argument 4 has type 'size_t' {aka 'unsigned int'} [-Wformat=] 256 | dev_dbg(&dev->device, "primary channel ring size = %lx", ring_size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dynamic_debug.h:223:29: note: in definition of macro '__dynamic_func_call_cls' 223 | func(&id, ##__VA_ARGS__); \ | ^~~~~~~~~~~ include/linux/dynamic_debug.h:249:9: note: in expansion of macro '_dynamic_func_call_cls' 249 | _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__) | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/dynamic_debug.h:272:9: note: in expansion of macro '_dynamic_func_call' 272 | _dynamic_func_call(fmt, __dynamic_dev_dbg, \ | ^~~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:155:9: note: in expansion of macro 'dynamic_dev_dbg' 155 | dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~~~~~ include/linux/dev_printk.h:155:30: note: in expansion of macro 'dev_fmt' 155 | dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~ drivers/uio/uio_hv_generic.c:256:9: note: in expansion of macro 'dev_dbg' 256 | dev_dbg(&dev->device, "primary channel ring size = %lx", ring_size); | ^~~~~~~ drivers/uio/uio_hv_generic.c:256:62: note: format string is defined here 256 | dev_dbg(&dev->device, "primary channel ring size = %lx", ring_size); | ~~^ | | | long unsigned int | %x cc1: some warnings being treated as errors vim +150 include/linux/moduleparam.h ^1da177e4c3f41 Linus Torvalds 2005-04-16 100 546970bc6afc7f Rusty Russell 2010-08-11 101 /** 546970bc6afc7f Rusty Russell 2010-08-11 102 * module_param - typesafe helper for a module/cmdline parameter e2854a1054ab17 Zhenzhong Duan 2019-11-04 103 * @name: the variable to alter, and exposed parameter name. 546970bc6afc7f Rusty Russell 2010-08-11 104 * @type: the type of the parameter 546970bc6afc7f Rusty Russell 2010-08-11 105 * @perm: visibility in sysfs. 546970bc6afc7f Rusty Russell 2010-08-11 106 * e2854a1054ab17 Zhenzhong Duan 2019-11-04 107 * @name becomes the module parameter, or (prefixed by KBUILD_MODNAME and a 546970bc6afc7f Rusty Russell 2010-08-11 108 * ".") the kernel commandline parameter. Note that - is changed to _, so 546970bc6afc7f Rusty Russell 2010-08-11 109 * the user can use "foo-bar=1" even for variable "foo_bar". 546970bc6afc7f Rusty Russell 2010-08-11 110 * c6a8b84da4c28b Randy Dunlap 2020-07-17 111 * @perm is 0 if the variable is not to appear in sysfs, or 0444 546970bc6afc7f Rusty Russell 2010-08-11 112 * for world-readable, 0644 for root-writable, etc. Note that if it b51d23e4e9fea6 Dan Streetman 2015-06-17 113 * is writable, you may need to use kernel_param_lock() around 546970bc6afc7f Rusty Russell 2010-08-11 114 * accesses (esp. charp, which can be kfreed when it changes). 546970bc6afc7f Rusty Russell 2010-08-11 115 * 546970bc6afc7f Rusty Russell 2010-08-11 116 * The @type is simply pasted to refer to a param_ops_##type and a 546970bc6afc7f Rusty Russell 2010-08-11 117 * param_check_##type: for convenience many standard types are provided but 546970bc6afc7f Rusty Russell 2010-08-11 118 * you can create your own by defining those variables. 546970bc6afc7f Rusty Russell 2010-08-11 119 * 546970bc6afc7f Rusty Russell 2010-08-11 120 * Standard types are: 7d8365771ffb0e Paul Menzel 2020-07-03 121 * byte, hexint, short, ushort, int, uint, long, ulong 546970bc6afc7f Rusty Russell 2010-08-11 122 * charp: a character pointer 546970bc6afc7f Rusty Russell 2010-08-11 123 * bool: a bool, values 0/1, y/n, Y/N. 546970bc6afc7f Rusty Russell 2010-08-11 124 * invbool: the above, only sense-reversed (N = true). 546970bc6afc7f Rusty Russell 2010-08-11 125 */ 546970bc6afc7f Rusty Russell 2010-08-11 126 #define module_param(name, type, perm) \ 546970bc6afc7f Rusty Russell 2010-08-11 127 module_param_named(name, name, type, perm) 546970bc6afc7f Rusty Russell 2010-08-11 128 3baee201b06cfa Jani Nikula 2014-08-27 129 /** 3baee201b06cfa Jani Nikula 2014-08-27 130 * module_param_unsafe - same as module_param but taints kernel b6d0531ec7e2ae Fabien Dessenne 2019-12-02 131 * @name: the variable to alter, and exposed parameter name. b6d0531ec7e2ae Fabien Dessenne 2019-12-02 132 * @type: the type of the parameter b6d0531ec7e2ae Fabien Dessenne 2019-12-02 133 * @perm: visibility in sysfs. 3baee201b06cfa Jani Nikula 2014-08-27 134 */ 3baee201b06cfa Jani Nikula 2014-08-27 135 #define module_param_unsafe(name, type, perm) \ 3baee201b06cfa Jani Nikula 2014-08-27 136 module_param_named_unsafe(name, name, type, perm) 3baee201b06cfa Jani Nikula 2014-08-27 137 546970bc6afc7f Rusty Russell 2010-08-11 138 /** 546970bc6afc7f Rusty Russell 2010-08-11 139 * module_param_named - typesafe helper for a renamed module/cmdline parameter 546970bc6afc7f Rusty Russell 2010-08-11 140 * @name: a valid C identifier which is the parameter name. 546970bc6afc7f Rusty Russell 2010-08-11 141 * @value: the actual lvalue to alter. 546970bc6afc7f Rusty Russell 2010-08-11 142 * @type: the type of the parameter 546970bc6afc7f Rusty Russell 2010-08-11 143 * @perm: visibility in sysfs. 546970bc6afc7f Rusty Russell 2010-08-11 144 * 546970bc6afc7f Rusty Russell 2010-08-11 145 * Usually it's a good idea to have variable names and user-exposed names the 546970bc6afc7f Rusty Russell 2010-08-11 146 * same, but that's harder if the variable must be non-static or is inside a 546970bc6afc7f Rusty Russell 2010-08-11 147 * structure. This allows exposure under a different name. 546970bc6afc7f Rusty Russell 2010-08-11 148 */ 546970bc6afc7f Rusty Russell 2010-08-11 149 #define module_param_named(name, value, type, perm) \ 546970bc6afc7f Rusty Russell 2010-08-11 @150 param_check_##type(name, &(value)); \ 546970bc6afc7f Rusty Russell 2010-08-11 151 module_param_cb(name, ¶m_ops_##type, &value, perm); \ 546970bc6afc7f Rusty Russell 2010-08-11 152 __MODULE_PARM_TYPE(name, #type) 546970bc6afc7f Rusty Russell 2010-08-11 153 -- 0-DAY CI Kernel Test Service https://01.org/lkp