X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fbacking-dev.c;h=e5de3781d3feed5b6f156b064b4af8bb79871fed;hb=a8127717cb24be7b8827a8d9e0ddbfde6b392146;hp=f50a2811f9dc86b876d24e75333558583c075f1d;hpb=7c2aed4b5632fb536721b8494d1a4a65852ffb49;p=linux-2.6

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index f50a2811f9..e5de3781d3 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -55,6 +55,22 @@ long congestion_wait(int rw, long timeout)
 }
 EXPORT_SYMBOL(congestion_wait);
 
+long congestion_wait_interruptible(int rw, long timeout)
+{
+	long ret;
+	DEFINE_WAIT(wait);
+	wait_queue_head_t *wqh = &congestion_wqh[rw];
+
+	prepare_to_wait(wqh, &wait, TASK_INTERRUPTIBLE);
+	if (signal_pending(current))
+		ret = -ERESTARTSYS;
+	else
+		ret = io_schedule_timeout(timeout);
+	finish_wait(wqh, &wait);
+	return ret;
+}
+EXPORT_SYMBOL(congestion_wait_interruptible);
+
 /**
  * congestion_end - wake up sleepers on a congested backing_dev_info
  * @rw: READ or WRITE