lkml.org 
[lkml]   [2007]   [Feb]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Optimize generic get_unaligned / put_unaligned implementations.
Andrew Morton wrote:
> hm. So if I have
>
> struct bar {
> unsigned long b;
> } __attribute__((packed));
>
> struct foo {
> unsigned long u;
> struct bar b;
> };
>
> then the compiler can see that foo.b.b is well-aligned, regardless of the
> packedness.

In Ralf's code, the structure is anonymous, and is used to declare a
pointer type, which is initialized from a void *. So I think the
compiler isn't allowed to assume anything about its alignment.

J
-
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: 2007-02-16 01:17    [W:0.172 / U:25.664 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site