Paul, On Tue, 16 Jul 2019, Paul Thomas wrote: > On Tue, Jul 16, 2019 at 7:14 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote: > > Either that patch is broken or it got broken on forward porting it from > > 4.19. Need to look with brain awake tomorrow. > > Yes! this looks like it fixes it. The hash I see is slightly different: > b7f42e8fb48cbe38e4c2d0cab48309aadfa6d032 > > But the name was the same "arch/arm64: Add lazy preempt support" So, brain works better now. Can you test the patch below? Thanks, tglx 8<---------------- diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 81312fb7f11c..5e2c3b33c20c 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -610,7 +610,7 @@ el1_irq: #ifdef CONFIG_PREEMPT ldr x24, [tsk, #TSK_TI_PREEMPT] // get preempt count - cbnz x24, 2f // preempt count != 0 + cbz x24, 1f // preempt count != 0 ldr w24, [tsk, #TSK_TI_PREEMPT_LAZY] // get preempt lazy count cbnz w24, 2f // preempt lazy count != 0
