Re: [PATCH - RFC] [1/2] 2.6 must-fix list - kernel error reporting

Andi Kleen
2003-07-08T18:59:29Z

Andrew Morton <akpm@osdl.org> writes:

> The layout of `struct kern_log_entry' may be problematic. Think of the
> situation where a 64-bit kernel constructs one of these and sends it up to
> 32-bit userspace. Will the structure layout be the same under the 32-bit
> compiler as under the 64-bit one?

No it won't. Best is to order the fields by size (arrays ordered by their
subtype). This should always give compatible alignment.

-Andi