X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fioprio.h;h=f98a656b17e5b4b732e57e0e70e4eb5ec53bce84;hb=18ce3751ccd488c78d3827e9f6bf54e6322676fb;hp=2a3bb1bb74336f27c27f6627153900d46d6c178a;hpb=7924e4f6519dd5b349ed146fe9fe35206730be67;p=linux-2.6

diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h
index 2a3bb1bb74..f98a656b17 100644
--- a/include/linux/ioprio.h
+++ b/include/linux/ioprio.h
@@ -67,6 +67,20 @@ static inline int task_nice_ioprio(struct task_struct *task)
 	return (task_nice(task) + 20) / 5;
 }
 
+/*
+ * This is for the case where the task hasn't asked for a specific IO class.
+ * Check for idle and rt task process, and return appropriate IO class.
+ */
+static inline int task_nice_ioclass(struct task_struct *task)
+{
+	if (task->policy == SCHED_IDLE)
+		return IOPRIO_CLASS_IDLE;
+	else if (task->policy == SCHED_FIFO || task->policy == SCHED_RR)
+		return IOPRIO_CLASS_RT;
+	else
+		return IOPRIO_CLASS_BE;
+}
+
 /*
  * For inheritance, return the highest of the two given priorities
  */