On 8/2/21 2:21 AM, Damien Le Moal wrote:

  /*
- * 8 best effort priority levels are supported
+ * The RT an BE priority classes support up to 8 priority levels.
   */
-#define IOPRIO_BE_NR	(8)
+#define IOPRIO_NR_LEVELS	(8)

Is this kind of change acceptable in a UAPI header? Can this change 
break the build of user space applications?

If this change is acceptable, how about the name IOPRIO_NR_BE_LEVELS? 
Additionally, please leave out the parentheses since these are not 
necessary.

Thanks,

Bart.