[PATCH] kdump: Fix crash_kexec - smp_send_stop race in panic

[Américo Wang]

On Thu, Nov 10, 2011 at 8:04 AM, Andrew Morton
<akpm at linux-foundation.org> wrote:
>
> Ho hum, I guess we stick with the original patch.  It *should* work, as
> long as all archtectures are doing the expected thing.  But in this
> situation it is bad of us to just hope that the architectures are doing
> this.  We should go and find out, rather than waiting for bug reports
> to come in.  Especially because in this case, bugs will take a very
> long time indeed to even be noticed.
>
> One way to resolve this would be to ask the various arch maintainers!

At least we can add the spin_lock just for x86 and s390, and leave
a big comment saying we are waiting for the other arch to be fixed...

Thanks.