diff options
| author | Paul E. McKenney <[email protected]> | 2024-02-28 11:30:43 -0800 |
|---|---|---|
| committer | Uladzislau Rezki (Sony) <[email protected]> | 2024-04-12 11:23:42 +0200 |
| commit | 64ec8b6ad61997262fb3373970377f5fb709454b (patch) | |
| tree | bd9c5673d59a74cd52bcdf84a961416c4ac488a7 | |
| parent | 1e52af7f023c44859868306fac1a4b6b556cf47b (diff) | |
ftrace: Choose RCU Tasks based on TASKS_RCU rather than PREEMPTION
The advent of CONFIG_PREEMPT_AUTO, AKA lazy preemption, will mean that
even kernels built with CONFIG_PREEMPT_NONE or CONFIG_PREEMPT_VOLUNTARY
might see the occasional preemption, and that this preemption just might
happen within a trampoline.
Therefore, update ftrace_shutdown() to invoke synchronize_rcu_tasks()
based on CONFIG_TASKS_RCU instead of CONFIG_PREEMPTION.
[ paulmck: Apply Steven Rostedt feedback. ]
Signed-off-by: Paul E. McKenney <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Ankur Arora <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: <[email protected]>
Signed-off-by: Uladzislau Rezki (Sony) <[email protected]>
| -rw-r--r-- | kernel/trace/ftrace.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index da1710499698..6c96b30f3d63 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -3157,8 +3157,7 @@ out: * synchronize_rcu_tasks() will wait for those tasks to * execute and either schedule voluntarily or enter user space. */ - if (IS_ENABLED(CONFIG_PREEMPTION)) - synchronize_rcu_tasks(); + synchronize_rcu_tasks(); ftrace_trampoline_free(ops); } |