linux-kernel - Re: [PATCH] kernel/irq: fix sparse warning: make symbol static

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Date:	Mon, 9 Feb 2009 10:16:04 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Hannes Eder <hannes@...neseder.net>,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel/irq: fix sparse warning: make symbol static


* Matthew Wilcox <matthew@....cx> wrote:

> On Sun, Feb 08, 2009 at 08:24:47PM +0100, Hannes Eder wrote:
> > -static inline int do_irq_select_affinity(int irq, struct irq_desc *desc)
> > +static inline int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
> 
> Does this not introduce a checkpatch warning about a line being longer
> than 80 columns?  Three acceptable ways to fix this:

It does - 81 cols. We could ignore it (it's close enough to the limit), but:

> static inline
> int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
> 
> static inline int do_irq_select_affinity(unsigned int irq,
> 							struct irq_desc *desc)
> 
> static inline int do_irq_select_affinity(unsigned irq, struct irq_desc *desc)
> 
> My favourite is the last one.

I went for the fourth way which is even better - see the commit below ;-)

Applied to tip/irq/urgent, thanks guys!

	Ingo

----------------->
>From 548c8933801c9ee347b6f1bad2491e4286a4f3a2 Mon Sep 17 00:00:00 2001
From: Hannes Eder <hannes@...neseder.net>
Date: Sun, 8 Feb 2009 20:24:47 +0100
Subject: [PATCH] kernel/irq: fix sparse warning: make symbol static

While being at it make every occurrence of 'do_irq_select_affinity'
have the same signature in terms of signedness of the first argument.

Fix this sparse warning:
  kernel/irq/manage.c:112:5: warning: symbol 'do_irq_select_affinity' was not declared. Should it be static?

Also rename do_irq_select_affinity() to setup_affinity() - shorter name
and clearer naming.

Signed-off-by: Hannes Eder <hannes@...neseder.net>
Acked-by: Matthew Wilcox <matthew@....cx>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/irq/manage.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 291f036..38008b8 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -109,7 +109,7 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 /*
  * Generic version of the affinity autoselector.
  */
-int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
+static int setup_affinity(unsigned int irq, struct irq_desc *desc)
 {
 	if (!irq_can_set_affinity(irq))
 		return 0;
@@ -133,7 +133,7 @@ set_affinity:
 	return 0;
 }
 #else
-static inline int do_irq_select_affinity(unsigned int irq, struct irq_desc *d)
+static inline int setup_affinity(unsigned int irq, struct irq_desc *d)
 {
 	return irq_select_affinity(irq);
 }
@@ -149,14 +149,14 @@ int irq_select_affinity_usr(unsigned int irq)
 	int ret;
 
 	spin_lock_irqsave(&desc->lock, flags);
-	ret = do_irq_select_affinity(irq, desc);
+	ret = setup_affinity(irq, desc);
 	spin_unlock_irqrestore(&desc->lock, flags);
 
 	return ret;
 }
 
 #else
-static inline int do_irq_select_affinity(int irq, struct irq_desc *desc)
+static inline int setup_affinity(unsigned int irq, struct irq_desc *desc)
 {
 	return 0;
 }
@@ -488,7 +488,7 @@ __setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new)
 			desc->status |= IRQ_NO_BALANCING;
 
 		/* Set default affinity mask once everything is setup */
-		do_irq_select_affinity(irq, desc);
+		setup_affinity(irq, desc);
 
 	} else if ((new->flags & IRQF_TRIGGER_MASK)
 			&& (new->flags & IRQF_TRIGGER_MASK)
--
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