INT_TO_POINTER macros: make 64-bit compatible

The INT_TO_POINTER and POINTER_TO_INT macros must accommodate larger
pointers on 64-bit systems that don't fit into an int.

In the INT_TO_POINTER case, we have to use an extra cast to intptr_t
as an intermediate widening type to avoid complaints from the compiler
when converting from an int.

This change makes no difference on 32-bit systems.

Signed-off-by: Nicolas Pitre <[email protected]>

Author: Nicolas Pitre

include/misc/util.h

@@ -19,13 +19,11 @@
 #include <zephyr/types.h>
 #include <stdbool.h>
 
-/* Helper to pass a int as a pointer or vice-versa.
- * Those are available for 32 bits architectures:
- */
-#define POINTER_TO_UINT(x) ((u32_t) (x))
-#define UINT_TO_POINTER(x) ((void *) (x))
-#define POINTER_TO_INT(x)  ((s32_t) (x))
-#define INT_TO_POINTER(x)  ((void *) (x))
+/* Helper to pass a int as a pointer or vice-versa. */
+#define POINTER_TO_UINT(x) ((uintptr_t) (x))
+#define UINT_TO_POINTER(x) ((void *) (uintptr_t) (x))
+#define POINTER_TO_INT(x)  ((intptr_t) (x))
+#define INT_TO_POINTER(x)  ((void *) (intptr_t) (x))
 
 #if !(defined (__CHAR_BIT__) && defined (__SIZEOF_LONG__))
 #	error Missing required predefined macros for BITS_PER_LONG calculation