[1/2] powerpc: System reset avoid interleaving oops using die synchronisation

[Michael Ellerman]

On Sat, 2017-12-23 at 16:49:22 UTC, Nicholas Piggin wrote:
> The die() oops path contains a serializing lock to prevent oops
> messages from being interleaved. In the case of a system reset
> initiated oops (e.g., qemu nmi command), __die was being called
> which lacks that synchronisation and oops reports could be
> interleaved across CPUs.
> 
> A recent patch 4388c9b3a6ee7 ("powerpc: Do not send system reset
> request through the oops path") changed this to __die to avoid
> the debugger() call, but there is no real harm to calling it twice
> if the first time fell through. So go back to using die() here.
> This was observed to fix the problem.
> 
> Fixes: 4388c9b3a6ee7 ("powerpc: Do not send system reset request through the oops path")
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
> Reviewed-by: David Gibson <david at gibson.dropbear.id.au>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/4552d128c26e0f0f27a5bd2fadc240

cheers