[PATCH] time_interpolator: Use readq_relaxed() instead of readq().
authorChristoph Lameter <clameter@engr.sgi.com>
Thu, 2 Mar 2006 10:54:35 +0000 (02:54 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Thu, 2 Mar 2006 16:33:07 +0000 (08:33 -0800)
commit685db65e422bfa523b8a9dacb5a658b42b254f05
tree0d7eba52e7c9584a2e3b4f2cd1842bf55e67c2d0
parent7f99f06f01aa9460b5a18f1b0e0900c90d0a84fc
[PATCH] time_interpolator: Use readq_relaxed() instead of readq().

On some platforms readq performs additional work to make sure I/O is done
in a coherent way.  This is not needed for time retrieval as done by the
time interpolator.  So we can use readq_relaxed instead which will improve
performance.

It affects sparc64 and ia64 only.  Apparently it makes a significant
difference on ia64.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: john stultz <johnstul@us.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
kernel/timer.c