diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-03-13 17:32:17 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-05-19 15:51:20 +0200 |
| commit | ff5c4f5cad33061b07c3fb9187506783c0f3cb66 (patch) | |
| tree | a391cabc83847be6d88107ea9a1f95557988013e /kernel/rcu/tree_plugin.h | |
| parent | x86: Replace ist_enter() with nmi_enter() (diff) | |
| download | linux-ff5c4f5cad33061b07c3fb9187506783c0f3cb66.tar.xz linux-ff5c4f5cad33061b07c3fb9187506783c0f3cb66.zip | |
rcu/tree: Mark the idle relevant functions noinstr
These functions are invoked from context tracking and other places in the
low level entry code. Move them into the .noinstr.text section to exclude
them from instrumentation.
Mark the places which are safe to invoke traceable functions with
instrumentation_begin/end() so objtool won't complain.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lkml.kernel.org/r/20200505134100.575356107@linutronix.de
Diffstat (limited to 'kernel/rcu/tree_plugin.h')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 50caa3fcbad2..352223664ebd 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -2539,7 +2539,7 @@ static void rcu_bind_gp_kthread(void) } /* Record the current task on dyntick-idle entry. */ -static void rcu_dynticks_task_enter(void) +static void noinstr rcu_dynticks_task_enter(void) { #if defined(CONFIG_TASKS_RCU) && defined(CONFIG_NO_HZ_FULL) WRITE_ONCE(current->rcu_tasks_idle_cpu, smp_processor_id()); @@ -2547,7 +2547,7 @@ static void rcu_dynticks_task_enter(void) } /* Record no current task on dyntick-idle exit. */ -static void rcu_dynticks_task_exit(void) +static void noinstr rcu_dynticks_task_exit(void) { #if defined(CONFIG_TASKS_RCU) && defined(CONFIG_NO_HZ_FULL) WRITE_ONCE(current->rcu_tasks_idle_cpu, -1); |