linux-kernel - Re: [PATCH 1/2] irq_flags_t: intro and core annotations

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Date:	Sat, 27 Oct 2007 22:32:04 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Alexey Dobriyan <adobriyan@...il.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] irq_flags_t: intro and core annotations

On Oct 28 2007 00:24, Alexey Dobriyan wrote:
>
>> (Which would be the logical choice if it were a function and not a 
>> macro...) That would flag up all violations ("without cast to different 
>> pointer" or so) while usually not breaking compilation.
>> 
>> Of course, irq_flags_t is probably the best long-term solution if one 
>> wants to hide a struct. (Even then perhaps, use a pointer instead?)
>
>IIRC, Christoph mentioned:
>
>	irq_flags_t flags;
>
>	flags = spin_lock_irqXXX(&lock);
>	spin_unlock_irqYYY(&lock, flags);
>
>where XXX and YYY are still to be found good names :^) It's also a solution
>without flag day and with more sane lock part -- "how flags are modified
>if they are passed by value?"
>
>I start to like this proposal but I can't come up with good names.
>

The BSD way: just add a number -- spin_lock_irq2()
Of course names are preferable.

	irq_spin_lock and irq_spin_unlock?
	spinirq_lock, spinirq_unlock?
	spin_lock_irq_disable, spin_lock_irq_enable (a bit verbose...)

Maybe the 'irq' part should be completely dropped from the name,
as with -rt extensions, it behaves differently, does not it?
(Or was it preemption?)
If it was a home project, I'd just flag it, if it was a business project,
I'd add the number, for Linux - ha, too big for me :-)
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