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yaml --- r: 161214 b: refs/heads/master c: d62f843 h: refs/heads/master v: v3
git-mirror · Sep 11, 2009 · 9dbdbf3 · 9dbdbf3
1 parent e8855f8
commit 9dbdbf3
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Showing 2 changed files with 10 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1b379d8daf4e981b2220f057683e35af022d45bc
+refs/heads/master: d62f843b295393124970d29316344150c7de009b
diff --git a/trunk/include/linux/blk-iopoll.h b/trunk/include/linux/blk-iopoll.h
@@ -18,10 +18,17 @@ enum {
 	IOPOLL_F_DISABLE	= 1,
 };
 
+/*
+ * Returns 0 if we successfully set the IOPOLL_F_SCHED bit, indicating
+ * that we were the first to acquire this iop for scheduling. If this iop
+ * is currently disabled, return "failure".
+ */
 static inline int blk_iopoll_sched_prep(struct blk_iopoll *iop)
 {
-	return !test_bit(IOPOLL_F_DISABLE, &iop->state) &&
-		!test_and_set_bit(IOPOLL_F_SCHED, &iop->state);
+	if (!test_bit(IOPOLL_F_DISABLE, &iop->state))
+		return test_and_set_bit(IOPOLL_F_SCHED, &iop->state);
+
+	return 1;
 }
 
 static inline int blk_iopoll_disable_pending(struct blk_iopoll *iop)