From 054860897cd35a4e9cec953ae955b429e31e74f7 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Thu, 31 Jan 2019 10:08:50 +0000 Subject: [PATCH] powerpc: Only use task_struct 'cpu' field on SMP When moving to CONFIG_THREAD_INFO_IN_TASK, the thread_info 'cpu' field gets moved into task_struct and only defined when CONFIG_SMP is set. This patch ensures that TI_CPU is only used when CONFIG_SMP is set and that task_struct 'cpu' field is not used directly out of SMP code. Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/head_fsl_booke.S | 2 ++ arch/powerpc/kernel/misc_32.S | 4 ++++ arch/powerpc/xmon/xmon.c | 2 +- 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 2386ce2a9c6e..2c21e8642a00 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -243,8 +243,10 @@ set_ivor: li r0,0 stwu r0,THREAD_SIZE-STACK_FRAME_OVERHEAD(r1) +#ifdef CONFIG_SMP CURRENT_THREAD_INFO(r22, r1) stw r24, TI_CPU(r22) +#endif bl early_init diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S index 57d2ffb2d45c..02b8cdd73792 100644 --- a/arch/powerpc/kernel/misc_32.S +++ b/arch/powerpc/kernel/misc_32.S @@ -183,10 +183,14 @@ _GLOBAL(low_choose_750fx_pll) or r4,r4,r5 mtspr SPRN_HID1,r4 +#ifdef CONFIG_SMP /* Store new HID1 image */ CURRENT_THREAD_INFO(r6, r1) lwz r6,TI_CPU(r6) slwi r6,r6,2 +#else + li r6, 0 +#endif addis r6,r6,nap_save_hid1@ha stw r4,nap_save_hid1@l(r6) diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 757b8499aba2..a0f44f992360 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -2997,7 +2997,7 @@ static void show_task(struct task_struct *tsk) printf("%px %016lx %6d %6d %c %2d %s\n", tsk, tsk->thread.ksp, tsk->pid, rcu_dereference(tsk->parent)->pid, - state, task_thread_info(tsk)->cpu, + state, task_cpu(tsk), tsk->comm); } -- 2.30.2