[PATCH 1/2] include: linux/math.h: promote DIV_ROUND_UP_ULL args to 64-bit

[Ahmad Fatoum]

DIV_ROUND_DOWN_ULL promotes division arguments to 64-bit, but
DIV_ROUND_UP_ULL did so only for the division, not the addition for the
round up. This would lead to a wrong result when the 32-bit addition
wraps around.

Linux has an explicit cast to fix this, so do likewise in barebox.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 include/linux/math.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/math.h b/include/linux/math.h
index acbffa96e6eb..f5d5cc714c4e 100644
--- a/include/linux/math.h
+++ b/include/linux/math.h
@@ -23,7 +23,8 @@
 #define DIV_ROUND_DOWN_ULL(ll, d) \
 	({ unsigned long long _tmp = (ll); do_div(_tmp, d); _tmp; })
 
-#define DIV_ROUND_UP_ULL(ll, d)		DIV_ROUND_DOWN_ULL((ll) + (d) - 1, (d))
+#define DIV_ROUND_UP_ULL(ll, d) \
+	DIV_ROUND_DOWN_ULL((unsigned long long)(ll) + (d) - 1, (d))
 
 #define DIV_ROUND_CLOSEST(x, divisor)(			\
 {							\
-- 
2.39.2