X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=include%2Flinux%2Fioprio.h;h=3f53bc27a19bfc904a126b6be354b2e18dd985ed;hb=679369114e55f422dc593d0628cfde1d04ae59b3;hp=e9bfe6972aed9f326cd42de03db6f47312732cd3;hpb=4f0237062ca70c8e34e16e518aee4b84c30d1832;p=linux-2.6-microblaze.git

diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h
index e9bfe6972aed..3f53bc27a19b 100644
--- a/include/linux/ioprio.h
+++ b/include/linux/ioprio.h
@@ -6,46 +6,22 @@
 #include <linux/sched/rt.h>
 #include <linux/iocontext.h>
 
-/*
- * Gives us 8 prio classes with 13-bits of data for each class
- */
-#define IOPRIO_CLASS_SHIFT	(13)
-#define IOPRIO_PRIO_MASK	((1UL << IOPRIO_CLASS_SHIFT) - 1)
-
-#define IOPRIO_PRIO_CLASS(mask)	((mask) >> IOPRIO_CLASS_SHIFT)
-#define IOPRIO_PRIO_DATA(mask)	((mask) & IOPRIO_PRIO_MASK)
-#define IOPRIO_PRIO_VALUE(class, data)	(((class) << IOPRIO_CLASS_SHIFT) | data)
-
-#define ioprio_valid(mask)	(IOPRIO_PRIO_CLASS((mask)) != IOPRIO_CLASS_NONE)
+#include <uapi/linux/ioprio.h>
 
 /*
- * These are the io priority groups as implemented by CFQ. RT is the realtime
- * class, it always gets premium service. BE is the best-effort scheduling
- * class, the default for any process. IDLE is the idle scheduling class, it
- * is only served when no one else is using the disk.
+ * Default IO priority.
  */
-enum {
-	IOPRIO_CLASS_NONE,
-	IOPRIO_CLASS_RT,
-	IOPRIO_CLASS_BE,
-	IOPRIO_CLASS_IDLE,
-};
+#define IOPRIO_DEFAULT	IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_BE_NORM)
 
 /*
- * 8 best effort priority levels are supported
+ * Check that a priority value has a valid class.
  */
-#define IOPRIO_BE_NR	(8)
-
-enum {
-	IOPRIO_WHO_PROCESS = 1,
-	IOPRIO_WHO_PGRP,
-	IOPRIO_WHO_USER,
-};
+static inline bool ioprio_valid(unsigned short ioprio)
+{
+	unsigned short class = IOPRIO_PRIO_CLASS(ioprio);
 
-/*
- * Fallback BE priority
- */
-#define IOPRIO_NORM	(4)
+	return class > IOPRIO_CLASS_NONE && class <= IOPRIO_CLASS_IDLE;
+}
 
 /*
  * if process has set io priority explicitly, use that. if not, convert
@@ -80,7 +56,7 @@ static inline int get_current_ioprio(void)
 
 	if (ioc)
 		return ioc->ioprio;
-	return IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0);
+	return IOPRIO_DEFAULT;
 }
 
 /*