From: Bart Van Assche <bvanassche@acm.org>
Date: Fri, 26 Nov 2010 18:22:48 +0000 (-0500)
Subject: IB/srp: allow lockless work posting
X-Git-Tag: v2.6.38-rc1~406^2^8~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcb4cb85f4b7caac9769bce464fef16306a4758c;p=pandora-kernel.git

IB/srp: allow lockless work posting

Only one CPU at a time will own an RX IU, so using the address of the IU
as the work request cookie allows us to avoid taking a lock. We can
similarly prepare the TX path for lockless posting by moving the free TX
IUs to a list. This also removes the requirement that the queue sizes be
a power of 2.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
[ broken out, small cleanups, and modified to avoid needing an extra field
  in the IU by David Dillow]
Signed-off-by: David Dillow <dillowda@ornl.gov>
---

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