lkml.org 
[lkml]   [2008]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] Mark i2o config broken on 64-bit platforms.
Date
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:

> 64bit kernel 32bit user space should be fine,

There's a place I pointed out in an earlier email where it appears a 64-bit
kernel can screw up, even with a 32-bit userspace. It allocates a piece of
RAM with kmalloc(), takes the address of it, passes that through
virt_to_bus(), discards the upper 32-bits from the result and posts it in an
I2O message, presumably to the device. That would appear likely to go kaboom
on a 64-bit system with more than 4GB of RAM.

If the device doesn't use that address, then why pass it at all?

David


\
 
 \ /
  Last update: 2008-07-09 18:21    [from the cache]
©2003-2011 Jasper Spaans