Re: Ipmi modules and linux-4.19.1

["Paul E. McKenney" <paulmck@linux.ibm.com>]

On Thu, Dec 20, 2018 at 08:05:14AM -0800, Tejun Heo wrote:
> Hello,
> 
> On Thu, Dec 20, 2018 at 08:04:08AM -0800, Paul E. McKenney wrote:
> > > Yes, it is possible.  Just do something like this:
> > > 
> > > 	struct srcu_struct my_srcu_struct;
> > > 
> > > And before the first use of my_srcu_struct, do this:
> > > 
> > > 	init_srcu_struct(&my_srcu_struct);
> > > 
> > > This will result in alloc_percpu() being invoked to allocate the
> > > needed per-CPU space.
> > > 
> > > If my_srcu_struct is used in a module or some such, then to avoid memory
> > > leaks, after the last use of my_srcu_struct, do this:
> > > 
> > > 	cleanup_srcu_struct(&my_srcu_struct);
> > > 
> > > There are several places in the kernel that take this approach.
> 
> Oops, my bad.  Somehow I thought the dynamic init didn't exist (I
> checked the header but somehow completely skipped over them).  Thanks
> for the explanation!

No problem, especially given that if things go as they usually do, I
will provide you ample opportunity to return the favor.  ;-)

							Thanx, Paul