[PATCH] include: linux/kernel.h: define PTR_ALIGN_DOWN/PTR_IS_ALIGNED

[Ahmad Fatoum]

Pointer casts to integers are a common cause of 64-bit incompatibilities.
Import PTR_ALIGN_DOWN/PTR_IS_ALIGNED macros from Linux to hide the cast.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 include/linux/kernel.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index bf820de22ca7..0e4ba243915b 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -14,6 +14,8 @@
 #define ALIGN_DOWN(x, a)	ALIGN((x) - ((a) - 1), (a))
 #define __ALIGN_MASK(x, mask)	(((x) + (mask)) & ~(mask))
 #define PTR_ALIGN(p, a)		((typeof(p))ALIGN((unsigned long)(p), (a)))
+#define PTR_ALIGN_DOWN(p, a)	((typeof(p))ALIGN_DOWN((unsigned long)(p), (a)))
+#define PTR_IS_ALIGNED(x, a)	IS_ALIGNED((unsigned long)(x), (a))
 #define IS_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
-- 
2.39.2