include/linux/eventpoll.h:81:13: sparse: sparse: restricted __poll_t degrades to integer

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5c1ee569660d4a205dced9cb4d0306b907fb7599
commit: 249dbe74d3c4b568a623fb55c56cddf19fdf0b89 ARM: 9108/1: oabi-compat: rework epoll_wait/epoll_pwait emulation
date:   6 months ago
config: riscv-randconfig-s031-20220221 (https://download.01.org/0day-ci/archive/20220223/202202231910.H30peLyl-lkp@xxxxxxxxx/config)
compiler: riscv32-linux-gcc (GCC) 11.2.0
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: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=249dbe74d3c4b568a623fb55c56cddf19fdf0b89
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 249dbe74d3c4b568a623fb55c56cddf19fdf0b89
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=riscv SHELL=/bin/bash

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


sparse warnings: (new ones prefixed by >>)
   fs/eventpoll.c: note: in included file:
>> include/linux/eventpoll.h:81:13: sparse: sparse: restricted __poll_t degrades to integer
>> include/linux/eventpoll.h:81:13: sparse: sparse: restricted __poll_t degrades to integer
   include/linux/eventpoll.h:81:13: sparse: sparse: cast from restricted __poll_t

vim +81 include/linux/eventpoll.h

    70	
    71	#if defined(CONFIG_ARM) && defined(CONFIG_OABI_COMPAT)
    72	/* ARM OABI has an incompatible struct layout and needs a special handler */
    73	extern struct epoll_event __user *
    74	epoll_put_uevent(__poll_t revents, __u64 data,
    75			 struct epoll_event __user *uevent);
    76	#else
    77	static inline struct epoll_event __user *
    78	epoll_put_uevent(__poll_t revents, __u64 data,
    79			 struct epoll_event __user *uevent)
    80	{
  > 81		if (__put_user(revents, &uevent->events) ||
    82		    __put_user(data, &uevent->data))
    83			return NULL;
    84	
    85		return uevent+1;
    86	}
    87	#endif
    88	

---
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