lkml.org 
[lkml]   [2010]   [Feb]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 08/10] x86-32: support atomic64_t on 386/486 UP/SMP
From
Date
On Wed, 2010-02-17 at 12:42 +0100, Luca Barbieri wrote:
> This patch makes atomic64 use either the generic implementation or
> the rewritten cmpxchg8b one just introduced by inserting a "call" to
> either, using the alternatives system to dynamically switch the calls.
>
> This allows to use atomic64_t on 386/486 which lack cmpxchg8b

IIRC we dropped <i586 SMP support, and since we don't have a PMU on
those chips atomic64_t doesn't need to be NMI safe, so a simple
UP-IRQ-disable implementation should suffice.



\
 
 \ /
  Last update: 2010-02-18 11:29    [W:0.419 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site