irqchip/mips-gic: Use for_each_set_bit to iterate over IRQs

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The MIPS GIC driver has previously iterated over bits set in a bitmap
representing pending IRQs by calling find_first_bit, clearing that bit
then calling find_first_bit again until all bits are clear. If multiple
interrupts are pending then this is wasteful, as find_first_bit will
have to loop over the whole bitmap from the start. Use the
for_each_set_bit macro which performs exactly what we need here instead.
It will use find_next_bit and thus only scan over the relevant part of
the bitmap, and it makes the intent of the code more clear.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Link: https://lkml.kernel.org/r/20160819171119.28121-1-paul.burton@imgtec.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

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Paul Burton 2016-08-19 18:11:19 +01:00 • committed by Jason Cooper

parent 29b4817d40

commit cae750bae4

1 changed files with 1 additions and 6 deletions

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drivers/irqchip/irq-mips-gic.c

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