Here are a few loosely related fixes for interrupt tracing code
and irq state handling which eliminates local_irq_enable() when
already enabled, and local_irq_disable() when already disabled,
and also fixes an NMI re-entrancy bug in irq tracing that has
been crashing in the field when PMU interrupts (non-maskable) and
irq tracing runs together it's causing things to get into "impossible"
states.
I have only tested 64s, and don't know if patch 1 and 2 are right
on 64e or 32 so if anyone could take a look or test, that would
be good.
Thanks,
Nick
Nicholas Piggin (4):
powerpc: define __ARCH_IRQ_EXIT_IRQS_DISABLED
powerpc/64: do not trace irqs-off at interrupt return to soft-disabled
context
cpuidle/powernv: avoid double irq enable coming out of idle
cpuidle/powernv: avoid double irq enable coming out of idle
arch/powerpc/include/asm/hardirq.h | 1 +
arch/powerpc/kernel/entry_64.S | 10 +++++++---
drivers/cpuidle/cpuidle-powernv.c | 2 ++
drivers/cpuidle/cpuidle-pseries.c | 6 ++++--
4 files changed, 14 insertions(+), 5 deletions(-)
--
2.15.0
