Hi Sean, [auto build test WARNING on linus/master] [also build test WARNING on v4.12-rc6 next-20170619] [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/Sean-Fu/fs-buffer-Modify-alloc_page_buffers/20170620-012328 config: x86_64-randconfig-x015-201725 (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 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/buffer.c: In function 'alloc_page_buffers': >> fs/buffer.c:895:21: warning: 'tail' may be used uninitialized in this function [-Wmaybe-uninitialized] tail->b_this_page = head; ~~~~~~~~~~~~~~~~~~^~~~~~ vim +/tail +895 fs/buffer.c 879 880 bh->b_this_page = head; 881 bh->b_blocknr = -1; 882 883 if (head == NULL) 884 tail = bh; 885 886 head = bh; 887 bh->b_state = b_state; 888 bh->b_size = size; 889 890 /* Link the buffer to its page */ 891 set_bh_page(bh, page, offset); 892 } 893 894 if (circular) > 895 tail->b_this_page = head; 896 897 return head; 898 /* 899 * In case anything failed, we just free everything we got. 900 */ 901 no_grow: 902 if (head) { 903 do { --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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