irqdomain: Reimplement irq_linear_revmap() with irq_find_mapping()

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irq_linear_revmap() is supposed to be a fast path for domain
lookups, but it only exposes low-level details of the irqdomain
implementation, details which are better kept private.

The *overhead* between the two is only a function call and
a couple of tests, so it is likely that noone can show any
meaningful difference compared to the cost of taking an
interrupt.

Reimplement irq_linear_revmap() with irq_find_mapping()
in order to preserve source code compatibility, and
rename the internal field for a measure.

Signed-off-by: Marc Zyngier <maz@kernel.org>

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Marc Zyngier 2021-04-02 12:50:14 +01:00

parent 405e94e9ae

commit 1da027362a

2 changed files with 12 additions and 16 deletions

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22

include/linux/irqdomain.h

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6

kernel/irq/irqdomain.c

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