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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-10-04 02:51:47 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-11-27 19:42:03 +0300 |
| commit | 844ccdd7dce2c1a6ea9b437fcf8c3265b136e4a5 (patch) | |
| tree | 849c27c829544f9cde57bd2fd311060d5206c1d6 /kernel/trace/trace.c | |
| parent | 51a1fd30f13090be7750fed86cf3728afaf4e394 (diff) | |
| download | linux-844ccdd7dce2c1a6ea9b437fcf8c3265b136e4a5.tar.xz | |
rcu: Eliminate rcu_irq_enter_disabled()
Now that the irq path uses the rcu_nmi_{enter,exit}() algorithm,
rcu_irq_enter() and rcu_irq_exit() may be used from any context. There is
thus no need for rcu_irq_enter_disabled() and for the checks using it.
This commit therefore eliminates rcu_irq_enter_disabled().
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 73e67b68c53b..dbce1be3bab8 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2682,17 +2682,6 @@ void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, if (unlikely(in_nmi())) return; - /* - * It is possible that a function is being traced in a - * location that RCU is not watching. A call to - * rcu_irq_enter() will make sure that it is, but there's - * a few internal rcu functions that could be traced - * where that wont work either. In those cases, we just - * do nothing. - */ - if (unlikely(rcu_irq_enter_disabled())) - return; - rcu_irq_enter_irqson(); __ftrace_trace_stack(buffer, flags, skip, pc, NULL); rcu_irq_exit_irqson(); |