linux-kernel - Re: [patch 4/6] brlock: introduce special brlocks

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Message-Id: <20091018222512.683973f7.akpm@linux-foundation.org>
Date:	Sun, 18 Oct 2009 22:25:12 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	npiggin@...e.de
Cc:	Al Viro <viro@...iv.linux.org.uk>, linux-fsdevel@...r.kernel.org,
	Ian Kent <raven@...maw.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 4/6] brlock: introduce special brlocks

On Thu, 15 Oct 2009 15:40:30 +1100 npiggin@...e.de wrote:

> +#define DECLARE_BRLOCK(name)						\

This:

> + DECLARE_PER_CPU(spinlock_t, name##_lock);				\
> + static inline void name##_lock_init(void) {				\
> +	int i;								\
> +	for_each_possible_cpu(i) {					\
> +		spinlock_t *lock;					\
> +		lock = &per_cpu(name##_lock, i);			\
> +		spin_lock_init(lock);					\
> +	}								\
> + }									\
> + static inline void name##_rlock(void) {				\
> +	spinlock_t *lock;						\
> +	lock = &get_cpu_var(name##_lock);				\
> +	spin_lock(lock);						\
> + }									\

generates a definition, not a declaration.  Hence DEFINE_BRLOCK.

</petpeeve #29>
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