tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-5.13/io_uring head: c5de00366e3e675f9e321983d9bd357c1fbea0e9 commit: 9096af3e9c8734a34703bd9fb5ab14292296f911 [119/120] io_uring: add helper for parsing poll events config: i386-randconfig-s002-20210414 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-280-g2cd6d34e-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/com... git remote add block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git git fetch --no-tags block for-5.13/io_uring git checkout 9096af3e9c8734a34703bd9fb5ab14292296f911 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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; sparse warnings: (new ones prefixed by >>) fs/io_uring.c:2888:24: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] __user * @@ got struct io_buffer *[assigned] kbuf @@ fs/io_uring.c:2888:24: sparse: expected void [noderef] __user * fs/io_uring.c:2888:24: sparse: got struct io_buffer *[assigned] kbuf fs/io_uring.c:4189:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct file *file @@ got struct file [noderef] __rcu * @@ fs/io_uring.c:4189:14: sparse: expected struct file *file fs/io_uring.c:4189:14: sparse: got struct file [noderef] __rcu * fs/io_uring.c:4794:72: sparse: sparse: incorrect type in argument 4 (different base types) @@ expected int mask @@ got restricted __poll_t [usertype] mask @@ fs/io_uring.c:4794:72: sparse: expected int mask fs/io_uring.c:4794:72: sparse: got restricted __poll_t [usertype] mask fs/io_uring.c:4798:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int [usertype] result @@ got restricted __poll_t [usertype] mask @@ fs/io_uring.c:4798:21: sparse: expected unsigned int [usertype] result fs/io_uring.c:4798:21: sparse: got restricted __poll_t [usertype] mask fs/io_uring.c:4823:29: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int [usertype] result @@ got restricted __poll_t @@ fs/io_uring.c:4823:29: sparse: expected unsigned int [usertype] result fs/io_uring.c:4823:29: sparse: got restricted __poll_t fs/io_uring.c:4904:49: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted __poll_t [usertype] mask @@ got unsigned int [usertype] result @@ fs/io_uring.c:4904:49: sparse: expected restricted __poll_t [usertype] mask fs/io_uring.c:4904:49: sparse: got unsigned int [usertype] result fs/io_uring.c:5053:41: sparse: sparse: incorrect type in argument 4 (different base types) @@ expected int mask @@ got restricted __poll_t [usertype] @@ fs/io_uring.c:5053:41: sparse: expected int mask fs/io_uring.c:5053:41: sparse: got restricted __poll_t [usertype] fs/io_uring.c:5141:22: sparse: sparse: invalid assignment: |= fs/io_uring.c:5141:22: sparse: left side has type restricted __poll_t fs/io_uring.c:5141:22: sparse: right side has type int fs/io_uring.c:5143:22: sparse: sparse: invalid assignment: |= fs/io_uring.c:5143:22: sparse: left side has type restricted __poll_t fs/io_uring.c:5143:22: sparse: right side has type int fs/io_uring.c:5148:22: sparse: sparse: invalid assignment: &= fs/io_uring.c:5148:22: sparse: left side has type restricted __poll_t fs/io_uring.c:5148:22: sparse: right side has type int fs/io_uring.c:5150:14: sparse: sparse: invalid assignment: |= fs/io_uring.c:5150:14: sparse: left side has type restricted __poll_t fs/io_uring.c:5150:14: sparse: right side has type int fs/io_uring.c:5164:67: sparse: sparse: incorrect type in argument 4 (different base types) @@ expected int mask @@ got restricted __poll_t [assigned] [usertype] mask @@ fs/io_uring.c:5164:67: sparse: expected int mask fs/io_uring.c:5164:67: sparse: got restricted __poll_t [assigned] [usertype] mask fs/io_uring.c:5165:52: sparse: sparse: incorrect type in argument 5 (different base types) @@ expected int events @@ got restricted __poll_t [usertype] events @@ fs/io_uring.c:5165:52: sparse: expected int events fs/io_uring.c:5165:52: sparse: got restricted __poll_t [usertype] events fs/io_uring.c:5295:24: sparse: sparse: invalid assignment: |= fs/io_uring.c:5295:24: sparse: left side has type unsigned int fs/io_uring.c:5295:24: sparse: right side has type restricted __poll_t fs/io_uring.c:5296:65: sparse: sparse: restricted __poll_t degrades to integer fs/io_uring.c:5296:29: sparse: sparse: restricted __poll_t degrades to integer fs/io_uring.c:5296:38: sparse: expected restricted __poll_t fs/io_uring.c:5296:38: sparse: got unsigned int fs/io_uring.c:5361:16: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int [usertype] events @@ got restricted __poll_t @@ fs/io_uring.c:5361:16: sparse: expected unsigned int [usertype] events fs/io_uring.c:5361:16: sparse: got restricted __poll_t fs/io_uring.c:5367:34: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __poll_t [usertype] events @@ got unsigned int [usertype] events @@ fs/io_uring.c:5367:34: sparse: expected restricted __poll_t [usertype] events fs/io_uring.c:5367:34: sparse: got unsigned int [usertype] events fs/io_uring.c:5376:30: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __poll_t [usertype] events @@ got unsigned int [usertype] events @@ fs/io_uring.c:5376:30: sparse: expected restricted __poll_t [usertype] events fs/io_uring.c:5376:30: sparse: got unsigned int [usertype] events fs/io_uring.c:5444:35: sparse: sparse: invalid assignment: &= fs/io_uring.c:5444:35: sparse: left side has type restricted __poll_t fs/io_uring.c:5444:35: sparse: right side has type int fs/io_uring.c:5445:54: sparse: sparse: restricted __poll_t degrades to integer fs/io_uring.c:5445:35: sparse: sparse: invalid assignment: |= fs/io_uring.c:5445:35: sparse: left side has type restricted __poll_t fs/io_uring.c:5445:35: sparse: right side has type unsigned int fs/io_uring.c:7202:9: sparse: sparse: context imbalance in 'io_sq_thread_unpark' - wrong count at exit fs/io_uring.c:7213:9: sparse: sparse: context imbalance in 'io_sq_thread_park' - wrong count at exit vim +5296 fs/io_uring.c 5284 5285 static __poll_t io_poll_parse_events(const struct io_uring_sqe *sqe, 5286 unsigned int flags) 5287 { 5288 u32 events; 5289 5290 events = READ_ONCE(sqe->poll32_events); 5291 #ifdef __BIG_ENDIAN 5292 events = swahw32(events); 5293 #endif 5294 if (!(flags & IORING_POLL_ADD_MULTI)) 5295 events |= EPOLLONESHOT; 5297 } 5298 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org