diff options
author | Christoph Lameter <cl@linux.com> | 2010-12-08 10:22:55 -0500 |
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committer | Tejun Heo <tj@kernel.org> | 2010-12-17 09:07:19 -0500 |
commit | 909ea96468096b07fbb41aaf69be060d92bd9271 (patch) | |
tree | a7e015edd96b5f674874fe78cdd889769e130a2a /include/linux/matroxfb.h | |
parent | 780f36d8b3fa9572f731d4fb85067b2e45e6f993 (diff) |
core: Replace __get_cpu_var with __this_cpu_read if not used for an address.
__get_cpu_var() can be replaced with this_cpu_read and will then use a
single read instruction with implied address calculation to access the
correct per cpu instance.
However, the address of a per cpu variable passed to __this_cpu_read()
cannot be determined (since it's an implied address conversion through
segment prefixes). Therefore apply this only to uses of __get_cpu_var
where the address of the variable is not used.
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Hugh Dickins <hughd@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/matroxfb.h')
0 files changed, 0 insertions, 0 deletions