[PATCH 3/4] lib: remove duplicate __div64_32

[Ahmad Fatoum]

f933da28cf3f ("include: <linux/math64.h>: sync with upstream") imported
the div64 code from Linux, which also defines __div64_32 as a weak
symbol. __div64_32 was defined before in a separate file though and used
from do_div. Remove this duplication.

No functional change.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 lib/Makefile      |  2 --
 lib/div64.c       | 54 -----------------------------------------------
 lib/math/Makefile |  1 +
 3 files changed, 1 insertion(+), 56 deletions(-)
 delete mode 100644 lib/div64.c

diff --git a/lib/Makefile b/lib/Makefile
index 9c6f4133d77c..9b37d847e0cc 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -9,8 +9,6 @@ obj-y			+= kstrtox.o
 obj-y			+= vsprintf.o
 obj-$(CONFIG_KASAN)	+= kasan/
 pbl-$(CONFIG_PBL_CONSOLE) += vsprintf.o
-obj-y			+= div64.o
-pbl-y			+= div64.o
 obj-y			+= misc.o
 obj-$(CONFIG_PARAMETER)	+= parameter.o
 obj-y			+= xfuncs.o
diff --git a/lib/div64.c b/lib/div64.c
deleted file mode 100644
index 0196725ce9b2..000000000000
--- a/lib/div64.c
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2003 Bernardo Innocenti <bernie at develer.com>
- *
- * Based on former do_div() implementation from asm-parisc/div64.h:
- *	Copyright (C) 1999 Hewlett-Packard Co
- *	Copyright (C) 1999 David Mosberger-Tang <davidm at hpl.hp.com>
- *
- *
- * Generic C version of 64bit/32bit division and modulo, with
- * 64bit result and 32bit remainder.
- *
- * The fast case for (n>>32 == 0) is handled inline by do_div().
- *
- * Code generated for this function might be very inefficient
- * for some CPUs. __div64_32() can be overridden by linking arch-specific
- * assembly versions such as arch/ppc/lib/div64.S and arch/sh/lib/div64.S.
- */
-
-#include <linux/types.h>
-
-#include <asm-generic/div64.h>
-
-uint32_t __div64_32(uint64_t *n, uint32_t base)
-{
-	uint64_t rem = *n;
-	uint64_t b = base;
-	uint64_t res, d = 1;
-	uint32_t high = rem >> 32;
-
-	/* Reduce the thing a bit first */
-	res = 0;
-	if (high >= base) {
-		high /= base;
-		res = (uint64_t) high << 32;
-		rem -= (uint64_t) (high*base) << 32;
-	}
-
-	while ((int64_t)b > 0 && b < rem) {
-		b = b+b;
-		d = d+d;
-	}
-
-	do {
-		if (rem >= b) {
-			rem -= b;
-			res += d;
-		}
-		b >>= 1;
-		d >>= 1;
-	} while (d);
-
-	*n = res;
-	return rem;
-}
diff --git a/lib/math/Makefile b/lib/math/Makefile
index 3341a8e4744b..c2c892dd557c 100644
--- a/lib/math/Makefile
+++ b/lib/math/Makefile
@@ -1 +1,2 @@
 obj-y += div64.o
+pbl-y += div64.o
-- 
2.29.2