linux-kernel - [arnd-playground:arm-kill-set_fs-10 5/9] arch/arm/kernel/sys_oabi-compat.c:284:21: sparse: sparse: incorrect type in initializer (different base types)

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Message-ID: <202107230403.wcCXL6Os-lkp@intel.com>
Date:   Fri, 23 Jul 2021 04:57:07 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [arnd-playground:arm-kill-set_fs-10 5/9]
 arch/arm/kernel/sys_oabi-compat.c:284:21: sparse: sparse: incorrect type in
 initializer (different base types)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git arm-kill-set_fs-10
head:   a6e0b06b967960c7e0a64bf10b8d1b7afaa4008e
commit: 50310ba6abb85af07544c5bb6e6bb07174e4b694 [5/9] ARM: oabi-compat: rework epoll_wait/epoll_pwait emulation
config: arm-randconfig-s031-20210722 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commit/?id=50310ba6abb85af07544c5bb6e6bb07174e4b694
        git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git
        git fetch --no-tags arnd-playground arm-kill-set_fs-10
        git checkout 50310ba6abb85af07544c5bb6e6bb07174e4b694
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
   arch/arm/kernel/sys_oabi-compat.c:264:23: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __poll_t [usertype] events @@     got unsigned int [addressable] [usertype] events @@
   arch/arm/kernel/sys_oabi-compat.c:264:23: sparse:     expected restricted __poll_t [usertype] events
   arch/arm/kernel/sys_oabi-compat.c:264:23: sparse:     got unsigned int [addressable] [usertype] events
>> arch/arm/kernel/sys_oabi-compat.c:284:21: sparse: sparse: incorrect type in initializer (different base types) @@     expected unsigned int __pu_val @@     got restricted __poll_t [usertype] revents @@
   arch/arm/kernel/sys_oabi-compat.c:284:21: sparse:     expected unsigned int __pu_val
   arch/arm/kernel/sys_oabi-compat.c:284:21: sparse:     got restricted __poll_t [usertype] revents
   arch/arm/kernel/sys_oabi-compat.c:334:25: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct old_timespec32 const [noderef] __user *timeout @@     got struct old_timespec32 * @@
   arch/arm/kernel/sys_oabi-compat.c:334:25: sparse:     expected struct old_timespec32 const [noderef] __user *timeout
   arch/arm/kernel/sys_oabi-compat.c:334:25: sparse:     got struct old_timespec32 *
   arch/arm/kernel/sys_oabi-compat.c:341:52: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct sembuf [noderef] __user *sops @@     got struct sembuf *[assigned] sops @@
   arch/arm/kernel/sys_oabi-compat.c:341:52: sparse:     expected struct sembuf [noderef] __user *sops
   arch/arm/kernel/sys_oabi-compat.c:341:52: sparse:     got struct sembuf *[assigned] sops

vim +284 arch/arm/kernel/sys_oabi-compat.c

   276	
   277	struct epoll_event __user *
   278	epoll_put_uevent(__poll_t revents, __u64 data,
   279			 struct epoll_event __user *uevent)
   280	{
   281		if (in_oabi_syscall()) {
   282			struct oabi_epoll_event __user *oevent = (void __user *)uevent;
   283	
 > 284			if (__put_user(revents, &oevent->events) ||
   285			    __put_user(data, &oevent->data))
   286				return NULL;
   287	
   288			return (void __user *)(oevent+1);
   289		}
   290	
   291		if (__put_user(revents, &uevent->events) ||
   292		    __put_user(data, &uevent->data))
   293			return NULL;
   294	
   295		return uevent+1;
   296	}
   297	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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