[XEN PATCH][for-4.19 v3 6/8] x86/mce: Move MC_NCLASSES into the enum mctelem_class

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

The definition of MC_NCLASSES contained a violation of MISRA C:2012
Rule 10.1, therefore by moving it as an enumeration constant resolves the
violation and makes it more resilient to possible additions to that enum.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
This patch has already been picked up in Andrew's for-next tree.

Note that the use of an enum constant as operand to [ ] and != is allowed
by the Rule.
---
 xen/arch/x86/cpu/mcheck/mctelem.c | 2 --
 xen/arch/x86/cpu/mcheck/mctelem.h | 5 +++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/cpu/mcheck/mctelem.c 
b/xen/arch/x86/cpu/mcheck/mctelem.c
index 329ac20faf96..77a4d1d5ff48 100644
--- a/xen/arch/x86/cpu/mcheck/mctelem.c
+++ b/xen/arch/x86/cpu/mcheck/mctelem.c
@@ -64,8 +64,6 @@ struct mctelem_ent {
 
 #define MC_NENT (MC_URGENT_NENT + MC_NONURGENT_NENT)
 
-#define        MC_NCLASSES             (MC_NONURGENT + 1)
-
 #define        COOKIE2MCTE(c)          ((struct mctelem_ent *)(c))
 #define        MCTE2COOKIE(tep)        ((mctelem_cookie_t)(tep))
 
diff --git a/xen/arch/x86/cpu/mcheck/mctelem.h 
b/xen/arch/x86/cpu/mcheck/mctelem.h
index d4eba53ae0e5..21b251847bc0 100644
--- a/xen/arch/x86/cpu/mcheck/mctelem.h
+++ b/xen/arch/x86/cpu/mcheck/mctelem.h
@@ -55,8 +55,9 @@
 typedef struct mctelem_cookie *mctelem_cookie_t;
 
 typedef enum mctelem_class {
-       MC_URGENT,
-       MC_NONURGENT
+    MC_URGENT,
+    MC_NONURGENT,
+    MC_NCLASSES
 } mctelem_class_t;
 
 extern void mctelem_init(unsigned int);
-- 
2.34.1