lkml.org 
[lkml]   [2010]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/4] x86: ioremap: fix physical address check
On 06/11/2010 02:20 AM, Kenji Kaneshige wrote:
> If the physical address is too high to be handled by ioremap() in
> x86_32 PAE (e.g. more than 36-bit physical address), ioremap() must
> return error (NULL). However, current x86 ioremap try to map this too
> high physical address, and it causes unexpected behavior.

What unexpected behavior? It is perfectly legitimately to map such a
high address in PAE mode. We have a 36-bit kernel-imposed limit on
*RAM* in 32-bit mode (because we can't manage more than that), but there
is no reason it should apply to I/O.

-hpa


\
 
 \ /
  Last update: 2010-06-11 19:45    [W:0.120 / U:0.220 seconds]
©2003-2014 Jasper Spaans. Advertise on this site