linux-kernel - [PATCH 04/10] binder: use freezable blocking calls

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Message-Id: <1367271946-7239-5-git-send-email-ccross@android.com>
Date:	Mon, 29 Apr 2013 14:45:40 -0700
From:	Colin Cross <ccross@...roid.com>
To:	linux-pm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	arve@...roid.com, Colin Cross <ccross@...roid.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	devel@...verdev.osuosl.org
Subject: [PATCH 04/10] binder: use freezable blocking calls

Avoid waking up every thread sleeping in a binder call during
suspend and resume by calling a freezable blocking call.

Signed-off-by: Colin Cross <ccross@...roid.com>
---
 drivers/staging/android/binder.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
index 24456a0..af8fba4 100644
--- a/drivers/staging/android/binder.c
+++ b/drivers/staging/android/binder.c
@@ -20,6 +20,7 @@
 #include <asm/cacheflush.h>
 #include <linux/fdtable.h>
 #include <linux/file.h>
+#include <linux/freezer.h>
 #include <linux/fs.h>
 #include <linux/list.h>
 #include <linux/miscdevice.h>
@@ -2140,13 +2141,13 @@ retry:
 			if (!binder_has_proc_work(proc, thread))
 				ret = -EAGAIN;
 		} else
-			ret = wait_event_interruptible_exclusive(proc->wait, binder_has_proc_work(proc, thread));
+			ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread));
 	} else {
 		if (non_block) {
 			if (!binder_has_thread_work(thread))
 				ret = -EAGAIN;
 		} else
-			ret = wait_event_interruptible(thread->wait, binder_has_thread_work(thread));
+			ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread));
 	}
 
 	binder_lock(__func__);
-- 
1.8.2.1

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