From 407821a34fce89b4f0b031dbab5cec7d059f46bc Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Fri, 7 Sep 2012 15:31:44 +0000 Subject: [PATCH] powerpc: Initialise paca.data_offset with poison It's possible for the cpu_possible_mask to change between the time we initialise the pacas and the time we setup per_cpu areas. Obviously impossible cpus shouldn't ever be running, but stranger things have happened. So be paranoid and initialise data_offset with a poison value in case we don't set it up later. Based on a patch from Anton Blanchard. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/paca.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index fbe1a12dc7f1..cd6da855090c 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -142,6 +142,7 @@ void __init initialise_paca(struct paca_struct *new_paca, int cpu) new_paca->hw_cpu_id = 0xffff; new_paca->kexec_state = KEXEC_STATE_NONE; new_paca->__current = &init_task; + new_paca->data_offset = 0xfeeeeeeeeeeeeeeeULL; #ifdef CONFIG_PPC_STD_MMU_64 new_paca->slb_shadow_ptr = &slb_shadow[cpu]; #endif /* CONFIG_PPC_STD_MMU_64 */ -- 2.20.1