module: Use this_cpu_xx to dynamically allocate counters

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Use cpu ops to deal with the per cpu data instead of a local_t. Reduces memory
requirements, cache footprint and decreases cycle counts.

The this_cpu_xx operations are also used for !SMP mode. Otherwise we could
not drop the use of __module_ref_addr() which would make per cpu data handling
complicated. this_cpu_xx operations have their own fallback for !SMP.

V8-V9:
- Leave include asm/module.h since ringbuffer.c depends on it. Nothing else
  does though. Another patch will deal with that.
- Remove spurious free.

Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Tejun Heo <tj@kernel.org>

...

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Christoph Lameter 2010-01-05 15:34:50 +09:00 • committed by Tejun Heo

parent 38b7827fcd

commit e1783a240f

2 changed files with 29 additions and 36 deletions

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36

include/linux/module.h

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29

kernel/module.c

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