linux-kernel - [ 050/175] math: Introduce div64

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Message-Id: <20120330194833.795278454@linuxfoundation.org>
Date:	Fri, 30 Mar 2012 12:49:15 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Thomas Gleixner <tglx@...utronix.de>,
	Sasha Levin <levinsasha928@...il.com>
Subject: [ 050/175] math: Introduce div64_long

3.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sasha Levin <levinsasha928@...il.com>

commit f910381a55cdaa097030291f272f6e6e4380c39a upstream.

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>
Cc: johnstul@...ibm.com
Link: http://lkml.kernel.org/r/1331829374-31543-1-git-send-email-levinsasha928@gmail.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/linux/math64.h |    4 ++++
 1 file changed, 4 insertions(+)

--- 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
 
 #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)
 {


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