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| author | Paul Mundt <lethal@linux-sh.org> | 2012-01-24 17:41:55 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2012-01-24 17:41:55 +0900 |
| commit | b59f9f9775e643435bba76e30e59e47c19c56dee (patch) | |
| tree | 55bc067e5d2da0fc01ef9808ded60d9234dde165 /drivers/sh/intc/core.c | |
| parent | 30377642138aadeef35a31c2f90dba0b6fa7b91a (diff) | |
| download | linux-b59f9f9775e643435bba76e30e59e47c19c56dee.tar.bz2 | |
sh: intc: optimize intc IRQ lookup
This ensures that the sense/prio lists are sorted at registration time,
enabling us to use a simple binary search for an optimized lookup
(something that had been on the TODO for some time).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/sh/intc/core.c')
| -rw-r--r-- | drivers/sh/intc/core.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c index c64690dda4a0..8e1fcd5e5f0d 100644 --- a/drivers/sh/intc/core.c +++ b/drivers/sh/intc/core.c @@ -2,7 +2,7 @@ * Shared interrupt handling code for IPR and INTC2 types of IRQs. * * Copyright (C) 2007, 2008 Magnus Damm - * Copyright (C) 2009, 2010 Paul Mundt + * Copyright (C) 2009 - 2012 Paul Mundt * * Based on intc2.c and ipr.c * @@ -31,6 +31,7 @@ #include <linux/spinlock.h> #include <linux/radix-tree.h> #include <linux/export.h> +#include <linux/sort.h> #include "internals.h" LIST_HEAD(intc_list); @@ -267,6 +268,9 @@ int __init register_intc_controller(struct intc_desc *desc) k += save_reg(d, k, hw->prio_regs[i].set_reg, smp); k += save_reg(d, k, hw->prio_regs[i].clr_reg, smp); } + + sort(d->prio, hw->nr_prio_regs, sizeof(*d->prio), + intc_handle_int_cmp, NULL); } if (hw->sense_regs) { @@ -277,6 +281,9 @@ int __init register_intc_controller(struct intc_desc *desc) for (i = 0; i < hw->nr_sense_regs; i++) k += save_reg(d, k, hw->sense_regs[i].reg, 0); + + sort(d->sense, hw->nr_sense_regs, sizeof(*d->sense), + intc_handle_int_cmp, NULL); } if (hw->subgroups) |