lkml.org 
[lkml]   [2006]   [Apr]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject[discuss] Re: [PATCH] [3/4] i386: Fix overflow in e820_all_mapped
>>> Linus Torvalds <torvalds@osdl.org> 28.04.06 07:39 >>>
>
>
>On Fri, 28 Apr 2006, Andi Kleen wrote:
>>
>> The 32bit version of e820_all_mapped() needs to use u64 to avoid
>> overflows on PAE systems. Pointed out by Jan Beulich
>
>I don't think that's true.
>
>It can't be called with 64-bit arguments anyway. If the base address
>doesn't fit in 32-bit, we'd be screwed in other places, afaik.

The arguments don't necessarily need to be u64, but (at least some of)
the calculations inside the function do. Otherwise, a region starting
below 4G and extending to or beyond 4G would not be considered
correctly.

Jan
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-04-28 09:09    [W:0.067 / U:0.268 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site