Hi Chris, Thank you for the patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on kees/for-next/seccomp kees/for-next/pstore linus/master v5.11-rc6 next-20210125] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Chris-Wilson/kernel-Expose-SYS_kcmp-by-default/20210206-004006 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2ab38c17aac10bf55ab3efde4c4db3893d8691d2 config: i386-randconfig-s002-20210205 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-215-g0fb77bb6-dirty # https://github.com/0day-ci/linux/commit/f7694e48ae81aac5a226e74421dbda1dcdc3ca92 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Chris-Wilson/kernel-Expose-SYS_kcmp-by-default/20210206-004006 git checkout f7694e48ae81aac5a226e74421dbda1dcdc3ca92 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): kernel/kcmp.c: In function 'kcmp_epoll_target': >> kernel/kcmp.c:117:13: error: implicit declaration of function 'get_epoll_tfile_raw_ptr'; did you mean 'get_file_raw_ptr'? [-Werror=implicit-function-declaration] 117 | filp_tgt = get_epoll_tfile_raw_ptr(filp_epoll, slot.tfd, slot.toff); | ^~~~~~~~~~~~~~~~~~~~~~~ | get_file_raw_ptr >> kernel/kcmp.c:117:11: warning: assignment to 'struct file *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 117 | filp_tgt = get_epoll_tfile_raw_ptr(filp_epoll, slot.tfd, slot.toff); | ^ cc1: some warnings being treated as errors vim +117 kernel/kcmp.c d97b46a64674a2 Cyrill Gorcunov 2012-05-31 96 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 97 #ifdef CONFIG_EPOLL 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 98 static int kcmp_epoll_target(struct task_struct *task1, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 99 struct task_struct *task2, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 100 unsigned long idx1, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 101 struct kcmp_epoll_slot __user *uslot) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 102 { 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 103 struct file *filp, *filp_epoll, *filp_tgt; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 104 struct kcmp_epoll_slot slot; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 105 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 106 if (copy_from_user(&slot, uslot, sizeof(slot))) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 107 return -EFAULT; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 108 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 109 filp = get_file_raw_ptr(task1, idx1); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 110 if (!filp) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 111 return -EBADF; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 112 f43c283a89a7dc Eric W. Biederman 2020-11-20 113 filp_epoll = fget_task(task2, slot.efd); f43c283a89a7dc Eric W. Biederman 2020-11-20 114 if (!filp_epoll) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 115 return -EBADF; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 116 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 @117 filp_tgt = get_epoll_tfile_raw_ptr(filp_epoll, slot.tfd, slot.toff); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 118 fput(filp_epoll); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 119 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 120 if (IS_ERR(filp_tgt)) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 121 return PTR_ERR(filp_tgt); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 122 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 123 return kcmp_ptr(filp, filp_tgt, KCMP_FILE); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 124 } 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 125 #else 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 126 static int kcmp_epoll_target(struct task_struct *task1, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 127 struct task_struct *task2, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 128 unsigned long idx1, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 129 struct kcmp_epoll_slot __user *uslot) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 130 { 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 131 return -EOPNOTSUPP; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 132 } 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 133 #endif 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 134 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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