linux-kernel - [PATCH 1/2] sunrpc: make rpc_wait_bit

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Message-Id: <1319782112-15094-1-git-send-email-jlayton@redhat.com>
Date:	Fri, 28 Oct 2011 02:08:31 -0400
From:	Jeff Layton <jlayton@...hat.com>
To:	rjw@...k.pl
Cc:	trond.myklebust@...app.com, linux-pm@...ts.linux-foundation.org,
	linux-nfs@...r.kernel.org, john@...va.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] sunrpc: make rpc_wait_bit_killable handle freeze events

Allow the wait_on_bit_killable sleeps in SUNRPC layer to respect the
freezer. This should allow suspend and hibernate events to occur, even
when there are RPC's pending on the wire.

Tested-by: John Hughes <john@...va.COM>
Acked-by: Trond Myklebust <Trond.Myklebust@...app.com>
Signed-off-by: Jeff Layton <jlayton@...hat.com>
---
 net/sunrpc/sched.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index d12ffa5..09bb64e 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -18,6 +18,7 @@
 #include <linux/smp.h>
 #include <linux/spinlock.h>
 #include <linux/mutex.h>
+#include <linux/freezer.h>
 
 #include <linux/sunrpc/clnt.h>
 
@@ -231,7 +232,8 @@ static int rpc_wait_bit_killable(void *word)
 {
 	if (fatal_signal_pending(current))
 		return -ERESTARTSYS;
-	schedule();
+	if (!try_to_freeze())
+		schedule();
 	return 0;
 }
 
-- 
1.7.6.4

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