diff options
Diffstat (limited to 'drivers/sh/intc/chip.c')
| -rw-r--r-- | drivers/sh/intc/chip.c | 27 |
1 files changed, 6 insertions, 21 deletions
diff --git a/drivers/sh/intc/chip.c b/drivers/sh/intc/chip.c index db10adf63dd..012df2676a2 100644 --- a/drivers/sh/intc/chip.c +++ b/drivers/sh/intc/chip.c @@ -2,13 +2,14 @@ * IRQ chip definitions for INTC IRQs. * * Copyright (C) 2007, 2008 Magnus Damm - * Copyright (C) 2009, 2010 Paul Mundt + * Copyright (C) 2009 - 2012 Paul Mundt * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #include <linux/cpumask.h> +#include <linux/bsearch.h> #include <linux/io.h> #include "internals.h" @@ -117,28 +118,12 @@ static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp, unsigned int nr_hp, unsigned int irq) { - int i; - - /* - * this doesn't scale well, but... - * - * this function should only be used for cerain uncommon - * operations such as intc_set_priority() and intc_set_type() - * and in those rare cases performance doesn't matter that much. - * keeping the memory footprint low is more important. - * - * one rather simple way to speed this up and still keep the - * memory footprint down is to make sure the array is sorted - * and then perform a bisect to lookup the irq. - */ - for (i = 0; i < nr_hp; i++) { - if ((hp + i)->irq != irq) - continue; + struct intc_handle_int key; - return hp + i; - } + key.irq = irq; + key.handle = 0; - return NULL; + return bsearch(&key, hp, nr_hp, sizeof(*hp), intc_handle_int_cmp); } int intc_set_priority(unsigned int irq, unsigned int prio) |