Re: [PATCH] NMI trigger switch support for debugging

[Paul Jackson <pj@sgi.com>]

Mikael Pettersson, replying to AKIYAMA Nobuyuki:
>  > +	if (!old_state == !unknown_nmi_panic)
>  > +		return 0;
> 
> This conditional looks terribly obscure.

Would the following variant seem clearer:

	if (!!unknown_nmi_panic == !!old_state)
		return 0;

Odd, I know.  For those of us familiar with the '!!' idiom, which
converts any value to its binary logical equivalent 0 (if zero) or
1 (otherwise), this reads as:

	if (the logical value of unknown_nmi_panic is unchanged)
		return 0;

However, I could easily imagine others finding this variant even
more bizarre.

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                          Paul Jackson <pj@sgi.com> 1.650.933.1373