X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=mm%2Fbacking-dev.c;h=efe2377420744d4d557b801ce4a265d3815cfb8f;hb=599d0c954f91d0689c9bb421b5bc04ea02437a41;hp=ed173b8ae8f24a317e11da29735f0a5faa9e361e;hpb=a52633d8e9c35832f1409dc5fa166019048a3f1f;p=deliverable%2Flinux.git

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index ed173b8ae8f2..efe237742074 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -947,24 +947,24 @@ long congestion_wait(int sync, long timeout)
 EXPORT_SYMBOL(congestion_wait);
 
 /**
- * wait_iff_congested - Conditionally wait for a backing_dev to become uncongested or a zone to complete writes
- * @zone: A zone to check if it is heavily congested
+ * wait_iff_congested - Conditionally wait for a backing_dev to become uncongested or a pgdat to complete writes
+ * @pgdat: A pgdat to check if it is heavily congested
  * @sync: SYNC or ASYNC IO
  * @timeout: timeout in jiffies
  *
  * In the event of a congested backing_dev (any backing_dev) and the given
- * @zone has experienced recent congestion, this waits for up to @timeout
+ * @pgdat has experienced recent congestion, this waits for up to @timeout
  * jiffies for either a BDI to exit congestion of the given @sync queue
  * or a write to complete.
  *
- * In the absence of zone congestion, cond_resched() is called to yield
+ * In the absence of pgdat congestion, cond_resched() is called to yield
  * the processor if necessary but otherwise does not sleep.
  *
  * The return value is 0 if the sleep is for the full timeout. Otherwise,
  * it is the number of jiffies that were still remaining when the function
  * returned. return_value == timeout implies the function did not sleep.
  */
-long wait_iff_congested(struct zone *zone, int sync, long timeout)
+long wait_iff_congested(struct pglist_data *pgdat, int sync, long timeout)
 {
 	long ret;
 	unsigned long start = jiffies;
@@ -973,12 +973,13 @@ long wait_iff_congested(struct zone *zone, int sync, long timeout)
 
 	/*
 	 * If there is no congestion, or heavy congestion is not being
-	 * encountered in the current zone, yield if necessary instead
+	 * encountered in the current pgdat, yield if necessary instead
 	 * of sleeping on the congestion queue
 	 */
 	if (atomic_read(&nr_wb_congested[sync]) == 0 ||
-	    !test_bit(ZONE_CONGESTED, &zone->flags)) {
+	    !test_bit(PGDAT_CONGESTED, &pgdat->flags)) {
 		cond_resched();
+
 		/* In case we scheduled, work out time remaining */
 		ret = timeout - (jiffies - start);
 		if (ret < 0)