[PATCH 1/2] kernel.h: Add DIV_ROUND_UP_ULL usage

["Nicholas A. Bellinger" <nab@linux-iscsi.org>]

From: Nicholas Bellinger <nab@linux-iscsi.org>

Add new DIV_ROUND_UP_ULL macro usage for 32-bit architectures requiring
unsigned long long division of sectors * dev_max_sectors.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
 include/linux/kernel.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 953352a..016dcc9 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -56,6 +56,8 @@
 
 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+#define DIV_ROUND_UP_ULL(ll,d) \
+	({ unsigned long long _tmp = (ll)+(d)-1; do_div(_tmp, d); _tmp; })
 
 /* The `const' in roundup() prevents gcc-3.3 from calling __divdi3 */
 #define roundup(x, y) (					\
-- 
1.7.2.5