From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> We must succeed parent's context irq status in page fault handler. Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> --- arch/csky/kernel/entry.S | 2 +- arch/csky/mm/fault.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/csky/kernel/entry.S b/arch/csky/kernel/entry.S index 185fea477a8d..c1bd7a6b4ab6 100644 --- a/arch/csky/kernel/entry.S +++ b/arch/csky/kernel/entry.S @@ -42,7 +42,7 @@ ENTRY(csky_pagefault) SAVE_ALL 0 zero_fp context_tracking - psrset ee, ie + psrset ee mov a0, sp jbsr do_page_fault jmpi ret_from_exception diff --git a/arch/csky/mm/fault.c b/arch/csky/mm/fault.c index 9533bd8d9a6a..cd8c7304c7e9 100644 --- a/arch/csky/mm/fault.c +++ b/arch/csky/mm/fault.c @@ -143,6 +143,10 @@ asmlinkage void do_page_fault(struct pt_regs *regs) return; } + /* Enable interrupts if they were enabled in the parent context. */ + if (likely(regs->sr & BIT(6))) + local_irq_enable(); + /* * If we're in an interrupt or have no user * context, we must not take the fault.. -- 2.17.1
