irqdomain: Replace LEGACY mapping with LINEAR

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The LEGACY mapping unnecessarily complicates the irqdomain code and
can easily be implemented with a linear mapping.  By ripping it out
and replacing it with the LINEAR mapping the object size of
irqdomain.c shrinks by about 330 bytes (ARMv7) which offsets the
additional allocation required by the linear map.  It also makes it
possible for current LEGACY map users to pre-allocate irq_descs for a
subset of the hwirqs and dynamically allocate the rest as needed.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Rob Herring <rob.herring@calxeda.com>

...

This commit is contained in:

Grant Likely 2013-06-06 12:10:24 +01:00

parent 5e1cda5b8a

commit 9bbf877d3b

2 changed files with 6 additions and 85 deletions

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7

include/linux/irqdomain.h

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84

kernel/irq/irqdomain.c

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