From 921fff351c3a7d2895f22d4a7a36b2f667709b9c Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Wed, 3 Feb 2016 23:34:21 +0100 Subject: [PATCH] powerpc/8xx: CONFIG_DEBUG_PAGEALLOC requires ITLBmiss for kernel addresses When CONFIG_DEBUG_PAGEALLOC is activated, the initial TLB mapping gets flushed to track accesses to wrong areas. Therefore, kernel addresses will also generate ITLB misses. Signed-off-by: Christophe Leroy Signed-off-by: Scott Wood --- arch/powerpc/kernel/head_8xx.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 78c1eba4c04a..e629e28b57e1 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -329,7 +329,7 @@ InstructionTLBMiss: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ -#ifdef CONFIG_MODULES +#if defined(CONFIG_MODULES) || defined (CONFIG_DEBUG_PAGEALLOC) /* Only modules will cause ITLB Misses as we always * pin the first 8MB of kernel memory */ mfspr r11, SPRN_SRR0 /* Get effective address of fault */ -- 2.20.1