tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d35b2284e966c0bef3e2182a5c5ea02177dd32e4 commit: 4057fd2cddaea0d6f6c5f8af4a455741f5632259 [4360/4582] function_graph: Do not update pid func if CONFIG_DYNAMIC_FTRACE not enabled config: csky-randconfig-001-20240607 (https://download.01.org/0day-ci/archive/20240607/202406071806.BRjaC5FF-lkp@xxxxxxxxx/config) compiler: csky-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240607/202406071806.BRjaC5FF-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202406071806.BRjaC5FF-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): kernel/trace/fgraph.c: In function 'fgraph_update_pid_func': >> kernel/trace/fgraph.c:1175:28: warning: unused variable 'op' [-Wunused-variable] 1175 | struct ftrace_ops *op; | ^~ >> kernel/trace/fgraph.c:1174:28: warning: unused variable 'gops' [-Wunused-variable] 1174 | struct fgraph_ops *gops; | ^~~~ kernel/trace/fgraph.c: At top level: >> kernel/trace/fgraph.c:1154:12: warning: 'fgraph_pid_func' defined but not used [-Wunused-function] 1154 | static int fgraph_pid_func(struct ftrace_graph_ent *trace, | ^~~~~~~~~~~~~~~ vim +/op +1175 kernel/trace/fgraph.c e73e679f656e67 Steven Rostedt (VMware 2018-11-15 1153) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 @1154) static int fgraph_pid_func(struct ftrace_graph_ent *trace, df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1155) struct fgraph_ops *gops) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1156) { df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1157) struct trace_array *tr = gops->ops.private; df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1158) int pid; df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1159) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1160) if (tr) { df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1161) pid = this_cpu_read(tr->array_buffer.data->ftrace_ignore_pid); df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1162) if (pid == FTRACE_PID_IGNORE) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1163) return 0; df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1164) if (pid != FTRACE_PID_TRACE && df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1165) pid != current->pid) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1166) return 0; df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1167) } df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1168) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1169) return gops->saved_func(trace, gops); df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1170) } df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1171) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1172) void fgraph_update_pid_func(void) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1173) { df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 @1174) struct fgraph_ops *gops; df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 @1175) struct ftrace_ops *op; df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1176) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1177) if (!(graph_ops.flags & FTRACE_OPS_FL_INITIALIZED)) df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1178) return; df3ec5da6a1e7f Steven Rostedt (Google 2024-06-03 1179) :::::: The code at line 1175 was first introduced by commit :::::: df3ec5da6a1e7f6e142680d7c5266d3af187170b function_graph: Add pid tracing back to function graph tracer :::::: TO: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> :::::: CC: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
