include: linux: Export santized ioprio header

Export sanitized ioprio.h for userspace.

Change-Id: Ifec6bc6b539c84fcba27751d4ac0de03458cd131
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 9a7081d..06772d9 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -207,6 +207,7 @@
 header-y += input.h
 header-y += ioctl.h
 header-y += ion.h
+header-y += ioprio.h
 header-y += ip.h
 header-y += ip6_tunnel.h
 header-y += ip_vs.h
diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h
index 76dad48..da6e8c5 100644
--- a/include/linux/ioprio.h
+++ b/include/linux/ioprio.h
@@ -1,14 +1,16 @@
 #ifndef IOPRIO_H
 #define IOPRIO_H
-
+#ifdef __KERNEL__
 #include <linux/sched.h>
 #include <linux/iocontext.h>
+#endif /* __KERNEL__ */
 
 /*
  * Gives us 8 prio classes with 13-bits of data for each class
  */
 #define IOPRIO_BITS		(16)
 #define IOPRIO_CLASS_SHIFT	(13)
+#ifdef __KERNEL__
 #define IOPRIO_PRIO_MASK	((1UL << IOPRIO_CLASS_SHIFT) - 1)
 
 #define IOPRIO_PRIO_CLASS(mask)	((mask) >> IOPRIO_CLASS_SHIFT)
@@ -16,6 +18,7 @@
 #define IOPRIO_PRIO_VALUE(class, data)	(((class) << IOPRIO_CLASS_SHIFT) | data)
 
 #define ioprio_valid(mask)	(IOPRIO_PRIO_CLASS((mask)) != IOPRIO_CLASS_NONE)
+#endif /* __KERNEL__ */
 
 /*
  * These are the io priority groups as implemented by CFQ. RT is the realtime
@@ -41,6 +44,7 @@
 	IOPRIO_WHO_USER,
 };
 
+#ifdef __KERNEL__
 /*
  * if process has set io priority explicitly, use that. if not, convert
  * the cpu scheduler nice value to an io priority
@@ -88,4 +92,5 @@
 
 extern int set_task_ioprio(struct task_struct *task, int ioprio);
 
-#endif
+#endif /* __KERNEL__ */
+#endif /* IOPRIO_H */