From mboxrd@z Thu Jan  1 00:00:00 1970
From: kyle@mcmartin.ca (Kyle McMartin)
Subject: Re: [parisc-linux] memory barriers, spinlocks, debuglocks, oh my
Date: Sat, 28 Aug 2004 13:07:52 -0400
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To: Joel Soete <soete.joel@tiscali.be>
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On Sat, Aug 28, 2004 at 04:57:57PM +0000, Joel Soete wrote:
> #define SPIN_LOCK_IRQSAVE(l,f) ({            \
>        spinlock_t *s = ATOMIC_HASH(l);                 \
>        local_irq_save(f);                              \
>        spin_lock(s);                                   \
> })
> 
This form allows you to use SPIN_LOCK_IRQSAVE as an rvalue, as in

#define foo(a) ({ \
	int _b = 10;
	_b += a;
	_b;
})

baz = foo(10);
baz == 20;

Cheers,
-- 
Kyle McMartin
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