Nicholas Piggin 47712a921b powerpc/watchdog: remove arch_trigger_cpumask_backtrace ... The powerpc NMI IPIs may not be recoverable if they are taken in some sections of code, and also there have been and still are issues with taking NMIs (in KVM guest code, in firmware, etc) which makes them a bit dangerous to use. Generic code like softlockup detector and rcu stall detectors really hammer on trigger_*_backtrace, which has lead to further problems because we've implemented it with the NMI. So stop providing NMI backtraces for now. Importantly, the powerpc code uses NMI IPIs in crash/debug, and the SMP hardlockup watchdog. So if the softlockup and rcu hang detection traces are not being printed because the CPU is stuck with interrupts off, then the hard lockup watchdog should get it with the NMI IPI. Fixes: 2104180a53 ("powerpc/64s: implement arch-specific hardlockup watchdog") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-01-18 15:43:43 +11:00
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asm	powerpc/watchdog: remove arch_trigger_cpumask_backtrace	2018-01-18 15:43:43 +11:00
uapi/asm	powerpc updates for 4.15	2017-11-16 12:47:46 -08:00