From: Jeff Layton <jlayton@poochiereds.net>
Date: Wed, 3 Jun 2015 20:14:26 +0000 (-0400)
Subject: sunrpc: make xprt->swapper an atomic_t
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~68^2~44
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8e2281330f9930bccf77cf04027ec60b6cc0fb34;p=pandora-kernel.git

sunrpc: make xprt->swapper an atomic_t

Split xs_swapper into enable/disable functions and eliminate the
"enable" flag.

Currently, it's racy if you have multiple swapon/swapoff operations
running in parallel over the same xprt. Also fix it so that we only
set it to a memalloc socket on a 0->1 transition and only clear it
on a 1->0 transition.

Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---

Reading git-diff-tree failed