Subject: [PATCHv3 1/5] efi/runtime-wrappers: detect FW irq flag corruption

From: [email-masked] (Matt Fleming)
Date: Mon, 25 Apr 2016 16:59:22 +0100

On Mon, 25 Apr, at 03:27:35PM, Mark Rutland wrote:
> 
> I have no strong preference so long as the code is correct.
> 
> Another option is to get rid of the bool entirely:
> 
> 	flags ^= cur_flags;
> 	if (!WARN_ON(flags & ARCH_EFI_IRQ_FLAGS_MASK))
> 		return;

OK, let's do the following because we need flags to be preserved for
printing,

---

	unsigned long cur_flags, mismatch;

	local_save_flags(cur_flags);

	mismatch = flags ^ cur_flags;
	if (!WARN_ON_ONCE(mismatch & ARCH_EFI_IRQ_FLAGS_MASK))
		return;