CC: kbuild-...@lists.01.org CC: linux-ker...@vger.kernel.org TO: "Steven, Rostedt, (VMware)," <rost...@goodmis.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9bf9511e3d9f328c03f6f79bfb741c3d18f2f2c0 commit: b3b1e6ededa4337940adba6cf06e8351056e3097 ftrace: Create set_ftrace_notrace_pid to not trace tasks date: 9 weeks ago :::::: branch date: 70 minutes ago :::::: commit date: 9 weeks ago config: mips-randconfig-m031-20200601 (attached as .config) compiler: mipsel-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <l...@intel.com> Reported-by: Dan Carpenter <dan.carpen...@oracle.com> smatch warnings: kernel/trace/ftrace.c:7171 pid_open() error: uninitialized symbol 'seq_ops'. # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b3b1e6ededa4337940adba6cf06e8351056e3097 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git remote update linus git checkout b3b1e6ededa4337940adba6cf06e8351056e3097 vim +/seq_ops +7171 kernel/trace/ftrace.c b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7146) b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7147) static int pid_open(struct inode *inode, struct file *file, int type) 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7148 { b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7149) const struct seq_operations *seq_ops; 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7150) struct trace_array *tr = inode->i_private; 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7151) struct seq_file *m; 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7152 int ret = 0; 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7153 8530dec63e7b486 Steven Rostedt (VMware 2019-10-11 7154) ret = tracing_check_open_get_tr(tr); 8530dec63e7b486 Steven Rostedt (VMware 2019-10-11 7155) if (ret) 8530dec63e7b486 Steven Rostedt (VMware 2019-10-11 7156) return ret; 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7157) 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7158 if ((file->f_mode & FMODE_WRITE) && 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7159 (file->f_flags & O_TRUNC)) b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7160) ftrace_pid_reset(tr, type); b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7161) b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7162) switch (type) { b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7163) case TRACE_PIDS: b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7164) seq_ops = &ftrace_pid_sops; b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7165) break; b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7166) case TRACE_NO_PIDS: b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7167) seq_ops = &ftrace_no_pid_sops; b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7168) break; b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 7169) } 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7170 b3b1e6ededa4337 Steven Rostedt (VMware 2020-03-19 @7171) ret = seq_open(file, seq_ops); 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7172) if (ret < 0) { 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7173) trace_array_put(tr); 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7174) } else { 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7175) m = file->private_data; 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7176) /* copy tr over to seq ops */ 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7177) m->private = tr; 345ddcc882d8896 Steven Rostedt (Red Hat 2016-04-22 7178) } 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7179 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7180 return ret; 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7181 } 756d17ee7ee4fbc jo...@redhat.com 2009-10-13 7182 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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