diff --git a/include/linux/err.h b/include/linux/err.h
index f2edce2..221fcfb 100644
--- a/include/linux/err.h
+++ b/include/linux/err.h
@@ -24,17 +24,17 @@
 	return (void *) error;
 }
 
-static inline long __must_check PTR_ERR(const void *ptr)
+static inline long __must_check PTR_ERR(__force const void *ptr)
 {
 	return (long) ptr;
 }
 
-static inline long __must_check IS_ERR(const void *ptr)
+static inline long __must_check IS_ERR(__force const void *ptr)
 {
 	return IS_ERR_VALUE((unsigned long)ptr);
 }
 
-static inline long __must_check IS_ERR_OR_NULL(const void *ptr)
+static inline long __must_check IS_ERR_OR_NULL(__force const void *ptr)
 {
 	return !ptr || IS_ERR_VALUE((unsigned long)ptr);
 }
@@ -46,13 +46,13 @@
  * 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)
+static inline void * __must_check ERR_CAST(__force const void *ptr)
 {
 	/* cast away the const */
 	return (void *) ptr;
 }
 
-static inline int __must_check PTR_RET(const void *ptr)
+static inline int __must_check PTR_RET(__force const void *ptr)
 {
 	if (IS_ERR(ptr))
 		return PTR_ERR(ptr);