aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--kernel/trace/ftrace.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index cd7f76d1eb86..98ae4ed965db 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -244,7 +244,11 @@ static void control_ops_free(struct ftrace_ops *ops)
244 244
245static void update_global_ops(void) 245static void update_global_ops(void)
246{ 246{
247 ftrace_func_t func; 247 ftrace_func_t func = ftrace_global_list_func;
248 void *private = NULL;
249
250 /* The list has its own recursion protection. */
251 global_ops.flags |= FTRACE_OPS_FL_RECURSION_SAFE;
248 252
249 /* 253 /*
250 * If there's only one function registered, then call that 254 * If there's only one function registered, then call that
@@ -254,23 +258,17 @@ static void update_global_ops(void)
254 if (ftrace_global_list == &ftrace_list_end || 258 if (ftrace_global_list == &ftrace_list_end ||
255 ftrace_global_list->next == &ftrace_list_end) { 259 ftrace_global_list->next == &ftrace_list_end) {
256 func = ftrace_global_list->func; 260 func = ftrace_global_list->func;
261 private = ftrace_global_list->private;
257 /* 262 /*
258 * As we are calling the function directly. 263 * As we are calling the function directly.
259 * If it does not have recursion protection, 264 * If it does not have recursion protection,
260 * the function_trace_op needs to be updated 265 * the function_trace_op needs to be updated
261 * accordingly. 266 * accordingly.
262 */ 267 */
263 if (ftrace_global_list->flags & FTRACE_OPS_FL_RECURSION_SAFE) 268 if (!(ftrace_global_list->flags & FTRACE_OPS_FL_RECURSION_SAFE))
264 global_ops.flags |= FTRACE_OPS_FL_RECURSION_SAFE;
265 else
266 global_ops.flags &= ~FTRACE_OPS_FL_RECURSION_SAFE; 269 global_ops.flags &= ~FTRACE_OPS_FL_RECURSION_SAFE;
267 } else {
268 func = ftrace_global_list_func;
269 /* The list has its own recursion protection. */
270 global_ops.flags |= FTRACE_OPS_FL_RECURSION_SAFE;
271 } 270 }
272 271
273
274 /* If we filter on pids, update to use the pid function */ 272 /* If we filter on pids, update to use the pid function */
275 if (!list_empty(&ftrace_pids)) { 273 if (!list_empty(&ftrace_pids)) {
276 set_ftrace_pid_function(func); 274 set_ftrace_pid_function(func);
@@ -278,6 +276,7 @@ static void update_global_ops(void)
278 } 276 }
279 277
280 global_ops.func = func; 278 global_ops.func = func;
279 global_ops.private = private;
281} 280}
282 281
283static void ftrace_sync(struct work_struct *work) 282static void ftrace_sync(struct work_struct *work)