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MIPS: irq: Use DECLARE_BITMAP

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Use the generic mechanism to declare a bitmap instead of unsigned long.

This could fix an overwrite defect of whatever follows irq_map.

Not all "#define NR_IRQS <value>" are a multiple of BITS_PER_LONG so
using DECLARE_BITMAP allocates the proper number of longs required
for the possible bits.

For instance:

arch/mips/include/asm/mach-ath79/irq.h:#define NR_IRQS                  51
arch/mips/include/asm/mach-db1x00/irq.h:#define NR_IRQS 152
arch/mips/include/asm/mach-lantiq/falcon/irq.h:#define NR_IRQS 328

Signed-off-by: Joe Perches <joe@perches.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: Gabor Juhos <juhosg@openwrt.org>
Cc: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: John Crispin <blogic@openwrt.org>
Patchwork: https://patchwork.linux-mips.org/patch/10091/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Joe Perches 2015-05-20 05:44:54 -07:00 committed by Ralf Baechle
parent 70f041b6e1
commit 884e7e5e7d
1 changed files with 1 additions and 1 deletions
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2
arch/mips/kernel/irq.c
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@ -29,7 +29,7 @@
int kgdb_early_setup;
#endif
static unsigned long irq_map[NR_IRQS / BITS_PER_LONG];
static DECLARE_BITMAP(irq_map, NR_IRQS);
int allocate_irqno(void)
{