Re: cmpxchg broken in some situation

[Fuxin Zhang <fxzhang@ict.ac.cn>]

The problem is here:

switch (sizeof(__ptr)) { // --> should be sizeof(*(__ptr))
case 4:
...
Recompiling..

Ralf Baechle 写道:
> On Mon, Oct 01, 2007 at 11:11:17PM +0800, Fuxin Zhang wrote:
>
>   
> > Sorry that it seems not work:
> > the kernel oops at sysfs_open_file->sysfs_get_active with unaligned 
> > access(last seen exception on screen, no serial console by hand so it 
> > may not be the first exception). It is probably caused by 
> > "atomic_cmpxchg" there.
> > And keep the old kernel using new modules with patched cmpxchg also lead 
> > to glxgears die(should be lock problem like before).
> >     
> Can you look at the disassembly of the generated code?  It should hopefully
> be relativly obvious in the disassembly.
>
>   Ralf
>
>
>
>