tree 1e31b61ca0c28f528321ff13ed6315475dbf6992
parent 05c2d088d0eb904e50460b04d77324c26cef4637
author Christoph Lameter <cl@linux.com> 1292344125 -0600
committer Tejun Heo <tj@kernel.org> 1292684088 +0100

irq_work: Use per cpu atomics instead of regular atomics

The irq work queue is a per cpu object and it is sufficient for
synchronization if per cpu atomics are used. Doing so simplifies
the code and reduces the overhead of the code.

Before:

christoph@linux-2.6$ size kernel/irq_work.o
   text	   data	    bss	    dec	    hex	filename
    451	      8	      1	    460	    1cc	kernel/irq_work.o

After:

christoph@linux-2.6$ size kernel/irq_work.o 
   text	   data	    bss	    dec	    hex	filename
    438	      8	      1	    447	    1bf	kernel/irq_work.o

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Christoph Lameter <cl@linux.com>