Re: 2.6.10-rc1-mm4

[Andi Kleen]

> > kernel BUG at arch/i386/mm/highmem.c:63!
> > EIP is at kunmap_atomic+0x27/0x70
> > Call Trace
> >   show_stack+0xa6/0xb0
> >   show_register+0x14d/0x1c0
> >   die+0x158/0x2e0
> >   do_invalid_op+0xef/0x100
> >   error_code+0x2b/0x30
> >   copy_pte_range+0x122/0x490
> 
> This might help:

Indeed. Thanks for fixing this.  I checked the other functions,
but it seems I only made this mistake once.

-Andi

> 
> 
> 
> 
> We're modifying src_pte and dst_pte in the for-loop, and then unmapping the
> modified pointers.  If one of them walked off the end of the page then blam.
> 
> 
> Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
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