Hi Hu", Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.4-rc8 next-20191121] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Chen-Hu/proc-align-mnt_id-in-proc-pid-fdinfo-and-proc-pid-mountinfo/20191122-093927 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 81429eb8d9ca40b0c65bb739d29fa856c5d5e958 config: parisc-c3000_defconfig (attached as .config) compiler: hppa-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=parisc If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): fs/namespace.c: In function 'lookup_mirror_mnt': >> fs/namespace.c:698:10: warning: return discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] return mnt; ^~~ vim +/const +698 fs/namespace.c 685 686 /* 687 * lookup_mirror_mnt - Return @mnt's mirror mount in the current/local mount 688 * namespace. If mirror isn't found, just return NULL. 689 */ 690 struct mount *lookup_mirror_mnt(const struct mount *mnt) 691 { 692 struct mnt_namespace *ns = current->nsproxy->mnt_ns; 693 struct mount *mnt_local; 694 bool is_matched = false; 695 696 /* mnt belongs to current namesapce */ 697 if (mnt->mnt_ns == ns) > 698 return mnt; 699 700 down_read(&namespace_sem); 701 list_for_each_entry(mnt_local, &ns->list, mnt_list) { 702 struct super_block *sb = mnt->mnt.mnt_sb; 703 struct super_block *sb_local = mnt_local->mnt.mnt_sb; 704 705 if (MAJOR(sb->s_dev) == MAJOR(sb_local->s_dev) && 706 MINOR(sb->s_dev) == MINOR(sb_local->s_dev)) { 707 is_matched = true; 708 break; 709 } 710 } 711 up_read(&namespace_sem); 712 713 return is_matched ? mnt_local : NULL; 714 } 715 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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