CDP_NUM_TYPES tracks the number of different configuration types that can
be applied to a resource. CDP_NUM_TYPES is required to iterate over the
different configurations but is not a member of enum resctrl_conf_type to
avoid the warning generated with -Wswitch when CDP_NUM_TYPES lacks a case.

Add a new CDP_LAST enum entry used in CDP_NUM_TYPES definition to simplify
adding a new enum entry. Do this to create a cleaner pattern for tracking
the number of enum entries in resctrl in preparation for other enums
needing to do so.

Suggested-by: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Ben Horgan <ben.horgan@arm.com>
---
Changes since v2:
- Add Ben's RB tag.
---
 include/linux/resctrl.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 006e57fd7ca5..0b28049378c8 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -69,9 +69,10 @@ enum resctrl_conf_type {
 	CDP_NONE,
 	CDP_CODE,
 	CDP_DATA,
+	CDP_LAST = CDP_DATA
 };
 
-#define CDP_NUM_TYPES	(CDP_DATA + 1)
+#define CDP_NUM_TYPES	(CDP_LAST + 1)
 
 /*
  * struct pseudo_lock_region - pseudo-lock region information
-- 
2.50.1