Hi Vishal, [auto build test WARNING on linux-nvdimm/libnvdimm-for-next] [also build test WARNING on v4.6-rc1 next-20160329] [cannot apply to xfs/for-next] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Vishal-Verma/dax-handling-of-media-errors/20160330-100409 base: https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm libnvdimm-for-next config: x86_64-randconfig-i0-03300245 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=x86_64 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): fs/ext4/indirect.c: In function 'ext4_ind_direct_IO': >> fs/ext4/indirect.c:719:11: warning: 'ret_saved' may be used uninitialized in this function [-Wmaybe-uninitialized] ssize_t ret_saved = 0; ^ vim +/ret_saved +719 fs/ext4/indirect.c 703 smp_mb(); 704 if (unlikely(ext4_test_inode_state(inode, 705 EXT4_STATE_DIOREAD_LOCK))) { 706 inode_dio_end(inode); 707 goto locked; 708 } 709 if (IS_DAX(inode)) 710 ret = dax_do_io(iocb, inode, iter, offset, 711 ext4_dio_get_block, NULL, 0); 712 else 713 ret = __blockdev_direct_IO(iocb, inode, 714 inode->i_sb->s_bdev, iter, 715 offset, ext4_dio_get_block, 716 NULL, NULL, 0); 717 inode_dio_end(inode); 718 } else { > 719 ssize_t ret_saved = 0; 720 721 locked: 722 if (IS_DAX(inode)) { 723 ret = dax_do_io(iocb, inode, iter, offset, 724 ext4_dio_get_block, NULL, DIO_LOCKING); 725 if (ret == -EIO && iov_iter_rw(iter) == WRITE) 726 ret_saved = ret; 727 else --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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