linux-kernel - [PATCH 1/2] math: Introduce div64

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Date:	Thu, 15 Mar 2012 12:36:13 -0400
From:	Sasha Levin <levinsasha928@...il.com>
To:	johnstul@...ibm.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org
Cc:	Sasha Levin <levinsasha928@...il.com>
Subject: [PATCH 1/2] math: Introduce div64_long

Add a div64_long macro which is used to devide a 64bit number by a long (which
can be 4 bytes on 32bit systems and 8 bytes on 64bit systems).

Suggested-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Sasha Levin <levinsasha928@...il.com>
---
 include/linux/math64.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/linux/math64.h b/include/linux/math64.h
index 23fcdfc..b8ba855 100644
--- a/include/linux/math64.h
+++ b/include/linux/math64.h
@@ -6,6 +6,8 @@
 
 #if BITS_PER_LONG == 64
 
+#define div64_long(x,y) div64_s64((x),(y))
+
 /**
  * div_u64_rem - unsigned 64bit divide with 32bit divisor with remainder
  *
@@ -45,6 +47,8 @@ static inline s64 div64_s64(s64 dividend, s64 divisor)
 
 #elif BITS_PER_LONG == 32
 
+#define div64_long(x,y) div_s64((x),(y))
+
 #ifndef div_u64_rem
 static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
 {
-- 
1.7.8.4

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