Commit 884e7e5e authored May 20, 2015 by Joe Perches Committed by Ralf Baechle May 26, 2015

MIPS: irq: Use DECLARE_BITMAP



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>

parent 70f041b6

arch/mips/kernel/irq.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)
		{

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