Hi Vincent, kernel test robot noticed the following build warnings:
[auto build test WARNING on 3e7f562e20ee87a25e104ef4fce557d39d62fa85] url: https://github.com/intel-lab-lkp/linux/commits/Vincent-Mailhol/kbuild-remove-gcc-s-Wtype-limits/20251220-190509 base: 3e7f562e20ee87a25e104ef4fce557d39d62fa85 patch link: https://lore.kernel.org/r/20251220-remove_wtype-limits-v3-3-24b170af700e%40kernel.org patch subject: [PATCH v3 3/3] overflow: Remove is_non_negative() and is_negative() config: sparc-randconfig-r072-20251227 (https://download.01.org/0day-ci/archive/20251227/[email protected]/config) compiler: sparc64-linux-gcc (GCC) 15.1.0 If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ smatch warnings: drivers/block/nbd.c:1612 __nbd_ioctl() warn: unsigned '_a' is never less than zero. vim +/_a +1612 drivers/block/nbd.c 55313e92bd17a87 Mike Christie 2019-08-13 1591 9442b739207aab6 Josef Bacik 2017-02-07 1592 /* Must be called with config_lock held */ 9442b739207aab6 Josef Bacik 2017-02-07 1593 static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, 9442b739207aab6 Josef Bacik 2017-02-07 1594 unsigned int cmd, unsigned long arg) 9442b739207aab6 Josef Bacik 2017-02-07 1595 { 5ea8d10802ec4c1 Josef Bacik 2017-04-06 1596 struct nbd_config *config = nbd->config; fad7cd3310db309 Baokun Li 2021-08-04 1597 loff_t bytesize; 5ea8d10802ec4c1 Josef Bacik 2017-04-06 1598 9442b739207aab6 Josef Bacik 2017-02-07 1599 switch (cmd) { 9442b739207aab6 Josef Bacik 2017-02-07 1600 case NBD_DISCONNECT: 29eaadc0364943b Josef Bacik 2017-04-06 1601 return nbd_disconnect(nbd); 9442b739207aab6 Josef Bacik 2017-02-07 1602 case NBD_CLEAR_SOCK: 0c1c9a27ce909e3 Christoph Hellwig 2023-08-11 1603 nbd_clear_sock_ioctl(nbd); 29eaadc0364943b Josef Bacik 2017-04-06 1604 return 0; 9442b739207aab6 Josef Bacik 2017-02-07 1605 case NBD_SET_SOCK: e46c7287b1c2768 Josef Bacik 2017-04-06 1606 return nbd_add_socket(nbd, arg, false); 9442b739207aab6 Josef Bacik 2017-02-07 1607 case NBD_SET_BLKSIZE: dcbddf541f18e36 Christoph Hellwig 2020-11-16 1608 return nbd_set_size(nbd, config->bytesize, arg); 9442b739207aab6 Josef Bacik 2017-02-07 1609 case NBD_SET_SIZE: 41e76c6a3c83c85 Nick Desaulniers 2021-09-20 1610 return nbd_set_size(nbd, arg, nbd_blksize(config)); 9442b739207aab6 Josef Bacik 2017-02-07 1611 case NBD_SET_SIZE_BLOCKS: 41e76c6a3c83c85 Nick Desaulniers 2021-09-20 @1612 if (check_shl_overflow(arg, config->blksize_bits, &bytesize)) fad7cd3310db309 Baokun Li 2021-08-04 1613 return -EINVAL; 41e76c6a3c83c85 Nick Desaulniers 2021-09-20 1614 return nbd_set_size(nbd, bytesize, nbd_blksize(config)); 9442b739207aab6 Josef Bacik 2017-02-07 1615 case NBD_SET_TIMEOUT: 55313e92bd17a87 Mike Christie 2019-08-13 1616 nbd_set_cmd_timeout(nbd, arg); 9442b739207aab6 Josef Bacik 2017-02-07 1617 return 0; 9442b739207aab6 Josef Bacik 2017-02-07 1618 9442b739207aab6 Josef Bacik 2017-02-07 1619 case NBD_SET_FLAGS: 5ea8d10802ec4c1 Josef Bacik 2017-04-06 1620 config->flags = arg; 9442b739207aab6 Josef Bacik 2017-02-07 1621 return 0; 9442b739207aab6 Josef Bacik 2017-02-07 1622 case NBD_DO_IT: 2a852a693f8839b Christoph Hellwig 2022-03-30 1623 return nbd_start_device_ioctl(nbd); ^1da177e4c3f415 Linus Torvalds 2005-04-16 1624 case NBD_CLEAR_QUE: 4b2f0260c74324a Herbert Xu 2006-01-06 1625 /* 4b2f0260c74324a Herbert Xu 2006-01-06 1626 * This is for compatibility only. The queue is always cleared 4b2f0260c74324a Herbert Xu 2006-01-06 1627 * by NBD_DO_IT or NBD_CLEAR_SOCK. 4b2f0260c74324a Herbert Xu 2006-01-06 1628 */ ^1da177e4c3f415 Linus Torvalds 2005-04-16 1629 return 0; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1630 case NBD_PRINT_DEBUG: fd8383fd88a2fd8 Josef Bacik 2016-09-08 1631 /* fd8383fd88a2fd8 Josef Bacik 2016-09-08 1632 * For compatibility only, we no longer keep a list of fd8383fd88a2fd8 Josef Bacik 2016-09-08 1633 * outstanding requests. fd8383fd88a2fd8 Josef Bacik 2016-09-08 1634 */ ^1da177e4c3f415 Linus Torvalds 2005-04-16 1635 return 0; ^1da177e4c3f415 Linus Torvalds 2005-04-16 1636 } 1a2ad21128bb4eb Pavel Machek 2009-04-02 1637 return -ENOTTY; 1a2ad21128bb4eb Pavel Machek 2009-04-02 1638 } 1a2ad21128bb4eb Pavel Machek 2009-04-02 1639 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
