lkml.org 
[lkml]   [2012]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: BUG: tracer_alloc_buffers returned with preemption imbalance
> >  static inline int rcu_blocking_is_gp(void)
> > {
> > might_sleep(); /* Check for RCU read-side critical section. */
> > + preempt_disable();
> > return num_online_cpus() <= 1;
> > + preempt_enable();
> > }
>
> Thank you! I have no idea how a preempt_disable() causes that badness
> to happen, but this commit is not yet critically important, so I will
> drop it.

preempt_enable() becomes dead code because of the return statement?
I wonder why gcc didn't issue a warning (or I failed to catch it)...

Thanks,
Fengguang


\
 
 \ /
  Last update: 2012-06-23 20:21    [W:0.066 / U:0.148 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site