[2/4] powerpc/64: do not trace irqs-off at interrupt return to soft-disabled context

[Michael Ellerman]

On Thu, 2017-11-16 at 16:00:50 UTC, Nicholas Piggin wrote:
> When an interrupt is returning to a soft-disabled context (which can
> happen for non-maskable interrupts or synchronous interrupts), it goes
> through the motions of soft-disabling again, including calling
> TRACE_DISABLE_INTS (i.e., trace_hardirqs_off()).
> 
> This is not necessary, because we must already be soft-disabled in the
> interrupt context, it also may be causing crashes in the irq tracing
> code to re-enter as an nmi. Replace it with a warning to ensure that
> soft-interrupts are still disabled.
> 
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/acb1feab320e38588fccc568e37677

cheers