Re: [PATCH] Enable 32bit dirty log pointers on 64bit host

[Marcelo Tosatti <mtosatti@redhat.com>]

On Wed, Oct 21, 2009 at 04:08:29PM +0200, Alexander Graf wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> With big endian userspace, we can't quite figure out if a pointer
> is 32 bit (shifted >> 32) or 64 bit when we read a 64 bit pointer.
> 
> This is what happens with dirty logging. To get the pointer interpreted
> correctly, we thus need Arnd's patch to implement a compat layer for
> the ioctl:
> 
> A better way to do this is to add a separate compat_ioctl() method that
> converts this for you.
> 
> From: Arnd Bergmann <arnd@arndb.de>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Acked-by: Alexander Graf <agraf@suse.de>
> 
> ---
> 
> Changes from Arnd's example version:
> 
>   - s/log.log/log/ (Avi)
>   - use sizeof(compat_log) (Avi)
>   - compile fixes

Applied, thanks.