linux-kernel - [PATCH 06/11] irqchip: mips-cpu: Drop unnecessary static

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Date:   Sat, 15 Jul 2017 22:07:41 +0200
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     keescook@...omium.org, kernel-janitors@...r.kernel.org,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 06/11] irqchip: mips-cpu: Drop unnecessary static

Drop static on a local variable, when the variable is initialized before
any possible use.  Thus, the static has no benefit.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@bad exists@
position p;
identifier x;
type T;
@@
static T x@p;
...
x = <+...x...+>

@@
identifier x;
expression e;
type T;
position p != bad.p;
@@
-static
 T x@p;
 ... when != x
     when strict
?x = e;
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
These patches are all independent of each other.

 drivers/irqchip/irq-mips-cpu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/drivers/irqchip/irq-mips-cpu.c b/drivers/irqchip/irq-mips-cpu.c
--- a/drivers/irqchip/irq-mips-cpu.c
+++ b/drivers/irqchip/irq-mips-cpu.c
@@ -154,7 +154,7 @@ asmlinkage void __weak plat_irq_dispatch
 static int mips_cpu_intc_map(struct irq_domain *d, unsigned int irq,
 			     irq_hw_number_t hw)
 {
-	static struct irq_chip *chip;
+	struct irq_chip *chip;
 
 	if (hw < 2 && cpu_has_mipsmt) {
 		/* Software interrupts are used for MT/CMT IPI */