this_cpu: Eliminate get/put_cpu
authorChristoph Lameter <cl@linux-foundation.org>
Sat, 3 Oct 2009 10:48:23 +0000 (19:48 +0900)
committerTejun Heo <tj@kernel.org>
Sat, 3 Oct 2009 10:48:23 +0000 (19:48 +0900)
commite7dcaa4755e35d7540bf19f316f8798357c53fa0
tree69c41151378213382199b577f2bc7b0d8bd1cc22
parentca0c9584b1f16bd5911893647cb7f1be82e60554
this_cpu: Eliminate get/put_cpu

There are cases where we can use this_cpu_ptr and as the result
of using this_cpu_ptr() we no longer need to determine the
currently executing cpu.

In those places no get/put_cpu combination is needed anymore.
The local cpu variable can be eliminated.

Preemption still needs to be disabled and enabled since the
modifications of the per cpu variables is not atomic. There may
be multiple per cpu variables modified and those must all
be from the same processor.

Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
cc: Eric Biederman <ebiederm@aristanetworks.com>
cc: Stephen Hemminger <shemminger@vyatta.com>
cc: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
drivers/dma/dmaengine.c
drivers/net/veth.c