Merge branch 'rework/printk_safe-removal' into for-linus

arch/arm/kernel/smp.c

arch/powerpc/kernel/traps.c

arch/powerpc/kernel/watchdog.c

arch/powerpc/kexec/crash.c

include/linux/hardirq.h

include/linux/printk.h

init/Kconfig

kernel/kexec_core.c

kernel/panic.c

kernel/printk/internal.h

kernel/printk/printk.c

kernel/printk/printk_safe.c

kernel/trace/trace.c

lib/nmi_backtrace.c