[PATCH v2 5/6] xen: remove unused function ERR_CAST

[Simone Ballarin <simone.ballarin@bugseng.com>]

From: Maria Celeste Cesario <maria.celeste.cesario@bugseng.com>

Function ERR_CAST contains a violation of MISRA C:2012 Rule 11.8,
whose headline states:
"A conversion shall not remove any const, volatile or _Atomic qualification
from the type pointed to by a pointer".

Since the function has no users, it is appropriate to remove it.

Signed-off-by: Maria Celeste Cesario  <maria.celeste.cesario@bugseng.com>
Signed-off-by: Simone Ballarin  <simone.ballarin@bugseng.com>
---
Commit introduced in v2.
---
 xen/include/xen/err.h | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/xen/include/xen/err.h b/xen/include/xen/err.h
index 2f29b57d28..cbdd1bf7f8 100644
--- a/xen/include/xen/err.h
+++ b/xen/include/xen/err.h
@@ -36,19 +36,6 @@ static inline long __must_check IS_ERR_OR_NULL(const void *ptr)
 	return !ptr || IS_ERR_VALUE((unsigned long)ptr);
 }
 
-/**
- * ERR_CAST - Explicitly cast an error-valued pointer to another pointer type
- * @ptr: The pointer to cast.
- *
- * Explicitly cast an error-valued pointer to another pointer type in such a
- * way as to make it clear that's what's going on.
- */
-static inline void * __must_check ERR_CAST(const void *ptr)
-{
-	/* cast away the const */
-	return (void *)ptr;
-}
-
 static inline int __must_check PTR_RET(const void *ptr)
 {
 	return IS_ERR(ptr) ? PTR_ERR(ptr) : 0;
-- 
2.40.0