diff options
Diffstat (limited to 'kernel/trace/rethook.c')
| -rw-r--r-- | kernel/trace/rethook.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/kernel/trace/rethook.c b/kernel/trace/rethook.c index 60f6cb2b486b..5eb9b598f4e9 100644 --- a/kernel/trace/rethook.c +++ b/kernel/trace/rethook.c @@ -54,6 +54,19 @@ static void rethook_free_rcu(struct rcu_head *head) } /** + * rethook_stop() - Stop using a rethook. + * @rh: the struct rethook to stop. + * + * Stop using a rethook to prepare for freeing it. If you want to wait for + * all running rethook handler before calling rethook_free(), you need to + * call this first and wait RCU, and call rethook_free(). + */ +void rethook_stop(struct rethook *rh) +{ + WRITE_ONCE(rh->handler, NULL); +} + +/** * rethook_free() - Free struct rethook. * @rh: the struct rethook to be freed. * @@ -301,7 +314,8 @@ unsigned long rethook_trampoline_handler(struct pt_regs *regs, break; handler = READ_ONCE(rhn->rethook->handler); if (handler) - handler(rhn, rhn->rethook->data, regs); + handler(rhn, rhn->rethook->data, + correct_ret_addr, regs); if (first == node) break; |