lkml.org 
[lkml]   [2014]   [Dec]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: atomic_inc and spin_lock_irq
On 18 Dec 2014 at 21:07, Rogelio M. Serrano Jr. wrote:

> whats the difference between:
>
> atomic_inc(&port->count);
>
> and
>
> spin_lock_irq(&port->lock);
> ++port->count;
> spin_unlock_irq(&port->lock);

in PaX this kind of change brings the ->count accesses under the coverage
of the REFCOUNT feature. if the kernel had a non-atomic refcount type and
corresponding accessors, they'd be used here instead.



\
 
 \ /
  Last update: 2014-12-23 04:21    [W:0.073 / U:0.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site