From d2e0d2c51adf348683e9f87da8298042a519deec Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 19 Jul 2017 14:49:42 +1000 Subject: [PATCH] powerpc/mm: Set fault flags earlier Move out the code that sets FAULT_FLAG_WRITE so the block that check access permissions can be extracted. While at it also set FAULT_FLAG_INSTRUCTION which will be used for protection keys. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Michael Ellerman --- arch/powerpc/mm/fault.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 572c801..ebe73c8 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -384,6 +384,10 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address, if (is_user) flags |= FAULT_FLAG_USER; + if (is_write) + flags |= FAULT_FLAG_WRITE; + if (is_exec) + flags |= FAULT_FLAG_INSTRUCTION; /* When running in the kernel we expect faults to occur only to * addresses in user space. All other faults represent errors in the @@ -476,7 +480,6 @@ good_area: } else if (is_write) { if (unlikely(!(vma->vm_flags & VM_WRITE))) return bad_area(regs, address); - flags |= FAULT_FLAG_WRITE; /* a read */ } else { if (unlikely(!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))) -- 2.7.4