Hi Christoph, [auto build test WARNING on linus/master] [also build test WARNING on next-20170707] [cannot apply to v4.12] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Christoph-Hellwig/fs-pass-iocb-to-do_generic_file_read/20170708-020747 config: x86_64-randconfig-x015-201727 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): fs/block_dev.c: In function 'blkdev_write_iter': >> fs/block_dev.c:1895:21: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if (iocb->ki_flags & (IOCB_NOWAIT | IOCB_DIRECT) == IOCB_NOWAIT) ^ vim +1895 fs/block_dev.c 1879 { 1880 struct file *file = iocb->ki_filp; 1881 struct inode *bd_inode = bdev_file_inode(file); 1882 loff_t size = i_size_read(bd_inode); 1883 struct blk_plug plug; 1884 ssize_t ret; 1885 1886 if (bdev_read_only(I_BDEV(bd_inode))) 1887 return -EPERM; 1888 1889 if (!iov_iter_count(from)) 1890 return 0; 1891 1892 if (iocb->ki_pos >= size) 1893 return -ENOSPC; 1894 > 1895 if (iocb->ki_flags & (IOCB_NOWAIT | IOCB_DIRECT) == IOCB_NOWAIT) 1896 return -EOPNOTSUPP; 1897 1898 iov_iter_truncate(from, size - iocb->ki_pos); 1899 1900 blk_start_plug(&plug); 1901 ret = __generic_file_write_iter(iocb, from); 1902 if (ret > 0) 1903 ret = generic_write_sync(iocb, ret); --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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