lkml.org 
[lkml]   [2010]   [Jan]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC PATCH] introduce sys_membarrier(): process-wide memory barrier (v5)
From
Date
On Thu, 2010-01-21 at 11:07 -0500, Mathieu Desnoyers wrote:
> * Peter Zijlstra (peterz@infradead.org) wrote:

> We can even create a generic fallback with the following kind of code in
> the meantime:
>
> static inline void spin_lock_mb(spinlock_t *lock)
> {
> spin_lock(&lock);

That would be spin_lock(lock);

> smp_mb();
> }
>
> static inline void spin_unlock_mb(spinlock_t *lock)
> {
> smp_mb();
> spin_unlock(&lock);

and spin_unlock(lock);

;-)

> }
>
> How does that sound ?

You may also need spin_lock_irqsave, et al. variants too.

-- Steve




\
 
 \ /
  Last update: 2010-01-21 17:15    [W:0.992 / U:0.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site