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authorStephen Hemminger <shemminger@linux-foundation.org>2007-03-25 19:54:23 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:23:33 -0700
commit3927f2e8f9afa3424bb51ca81f7abac01ffd0005 (patch)
treeda9e335169572e6c743c084edce6a802f9e667ee
parent9d729f72dca9406025bcfa9c1f660d71d9ef0ff5 (diff)
[NET]: div64_64 consolidate (rev3)
Here is the current version of the 64 bit divide common code. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/asm-arm/div64.h3
-rw-r--r--include/asm-generic/div64.h7
-rw-r--r--include/asm-i386/div64.h4
-rw-r--r--include/asm-m68k/div64.h3
-rw-r--r--include/asm-mips/div64.h11
-rw-r--r--include/asm-um/div64.h1
-rw-r--r--include/asm-xtensa/div64.h6
-rw-r--r--lib/Makefile5
-rw-r--r--lib/div64.c22
-rw-r--r--net/ipv4/tcp_cubic.c23
-rw-r--r--net/ipv4/tcp_yeah.c21
-rw-r--r--net/ipv4/tcp_yeah.h1
-rw-r--r--net/netfilter/xt_connbytes.c16
13 files changed, 60 insertions, 63 deletions
diff --git a/include/asm-arm/div64.h b/include/asm-arm/div64.h
index 37e0a96e8789..0b5f881c3d85 100644
--- a/include/asm-arm/div64.h
+++ b/include/asm-arm/div64.h
@@ -2,6 +2,7 @@
#define __ASM_ARM_DIV64
#include <asm/system.h>
+#include <linux/types.h>
/*
* The semantics of do_div() are:
@@ -223,4 +224,6 @@
#endif
+extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
+
#endif
diff --git a/include/asm-generic/div64.h b/include/asm-generic/div64.h
index 8f4e3193342e..a4a49370793c 100644
--- a/include/asm-generic/div64.h
+++ b/include/asm-generic/div64.h
@@ -30,6 +30,11 @@
__rem; \
})
+static inline uint64_t div64_64(uint64_t dividend, uint64_t divisor)
+{
+ return dividend / divisor;
+}
+
#elif BITS_PER_LONG == 32
extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
@@ -49,6 +54,8 @@ extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
__rem; \
})
+extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
+
#else /* BITS_PER_LONG == ?? */
# error do_div() does not yet support the C64
diff --git a/include/asm-i386/div64.h b/include/asm-i386/div64.h
index 75c67c785bb8..438e980068bd 100644
--- a/include/asm-i386/div64.h
+++ b/include/asm-i386/div64.h
@@ -1,6 +1,8 @@
#ifndef __I386_DIV64
#define __I386_DIV64
+#include <linux/types.h>
+
/*
* do_div() is NOT a C function. It wants to return
* two values (the quotient and the remainder), but
@@ -45,4 +47,6 @@ div_ll_X_l_rem(long long divs, long div, long *rem)
return dum2;
}
+
+extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif
diff --git a/include/asm-m68k/div64.h b/include/asm-m68k/div64.h
index 9f65de1a2480..33caad1628d4 100644
--- a/include/asm-m68k/div64.h
+++ b/include/asm-m68k/div64.h
@@ -1,6 +1,8 @@
#ifndef _M68K_DIV64_H
#define _M68K_DIV64_H
+#include <linux/types.h>
+
/* n = n / base; return rem; */
#define do_div(n, base) ({ \
@@ -23,4 +25,5 @@
__rem; \
})
+extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif /* _M68K_DIV64_H */
diff --git a/include/asm-mips/div64.h b/include/asm-mips/div64.h
index d107832de1b6..66189f5f6399 100644
--- a/include/asm-mips/div64.h
+++ b/include/asm-mips/div64.h
@@ -1,6 +1,6 @@
/*
* Copyright (C) 2000, 2004 Maciej W. Rozycki
- * Copyright (C) 2003 Ralf Baechle
+ * Copyright (C) 2003, 07 Ralf Baechle (ralf@linux-mips.org)
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
@@ -9,6 +9,8 @@
#ifndef _ASM_DIV64_H
#define _ASM_DIV64_H
+#include <linux/types.h>
+
#if (_MIPS_SZLONG == 32)
#include <asm/compiler.h>
@@ -78,6 +80,8 @@
__quot = __quot << 32 | __low; \
(n) = __quot; \
__mod; })
+
+extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif /* (_MIPS_SZLONG == 32) */
#if (_MIPS_SZLONG == 64)
@@ -101,6 +105,11 @@
(n) = __quot; \
__mod; })
+static inline uint64_t div64_64(uint64_t dividend, uint64_t divisor)
+{
+ return dividend / divisor;
+}
+
#endif /* (_MIPS_SZLONG == 64) */
#endif /* _ASM_DIV64_H */
diff --git a/include/asm-um/div64.h b/include/asm-um/div64.h
index 1e17f7409cab..7b73b2cd5b34 100644
--- a/include/asm-um/div64.h
+++ b/include/asm-um/div64.h
@@ -3,4 +3,5 @@
#include "asm/arch/div64.h"
+extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif
diff --git a/include/asm-xtensa/div64.h b/include/asm-xtensa/div64.h
index c4a105776383..20965e3af1dd 100644
--- a/include/asm-xtensa/div64.h
+++ b/include/asm-xtensa/div64.h
@@ -11,9 +11,15 @@
#ifndef _XTENSA_DIV64_H
#define _XTENSA_DIV64_H
+#include <linux/types.h>
+
#define do_div(n,base) ({ \
int __res = n % ((unsigned int) base); \
n /= (unsigned int) base; \
__res; })
+static inline uint64_t div64_64(uint64_t dividend, uint64_t divisor)
+{
+ return dividend / divisor;
+}
#endif
diff --git a/lib/Makefile b/lib/Makefile
index 992a39ef9ffd..ae57f357fec0 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -4,7 +4,7 @@
lib-y := ctype.o string.o vsprintf.o cmdline.o \
rbtree.o radix-tree.o dump_stack.o \
- idr.o div64.o int_sqrt.o bitmap.o extable.o prio_tree.o \
+ idr.o int_sqrt.o bitmap.o extable.o prio_tree.o \
sha1.o irq_regs.o reciprocal_div.o
lib-$(CONFIG_MMU) += ioremap.o
@@ -12,7 +12,8 @@ lib-$(CONFIG_SMP) += cpumask.o
lib-y += kobject.o kref.o kobject_uevent.o klist.o
-obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o bust_spinlocks.o
+obj-y += div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
+ bust_spinlocks.o
ifeq ($(CONFIG_DEBUG_KOBJECT),y)
CFLAGS_kobject.o += -DDEBUG
diff --git a/lib/div64.c b/lib/div64.c
index 365719f84832..c3d7655cdfb5 100644
--- a/lib/div64.c
+++ b/lib/div64.c
@@ -58,4 +58,26 @@ uint32_t __div64_32(uint64_t *n, uint32_t base)
EXPORT_SYMBOL(__div64_32);
+/* 64bit divisor, dividend and result. dynamic precision */
+uint64_t div64_64(uint64_t dividend, uint64_t divisor)
+{
+ uint32_t d = divisor;
+
+ if (divisor > 0xffffffffULL) {
+ unsigned int shift = fls(divisor >> 32);
+
+ d = divisor >> shift;
+ dividend >>= shift;
+ }
+
+ /* avoid 64 bit division if possible */
+ if (dividend >> 32)
+ do_div(dividend, d);
+ else
+ dividend = (uint32_t) dividend / d;
+
+ return dividend;
+}
+EXPORT_SYMBOL(div64_64);
+
#endif /* BITS_PER_LONG == 32 */
diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
index 9a582fb4ef9f..6f08adbda54e 100644
--- a/net/ipv4/tcp_cubic.c
+++ b/net/ipv4/tcp_cubic.c
@@ -51,8 +51,6 @@ MODULE_PARM_DESC(bic_scale, "scale (scaled by 1024) value for bic function (bic_
module_param(tcp_friendliness, int, 0644);
MODULE_PARM_DESC(tcp_friendliness, "turn on/off tcp friendliness");
-#include <asm/div64.h>
-
/* BIC TCP Parameters */
struct bictcp {
u32 cnt; /* increase cwnd by 1 after ACKs */
@@ -93,27 +91,6 @@ static void bictcp_init(struct sock *sk)
tcp_sk(sk)->snd_ssthresh = initial_ssthresh;
}
-/* 64bit divisor, dividend and result. dynamic precision */
-static inline u_int64_t div64_64(u_int64_t dividend, u_int64_t divisor)
-{
- u_int32_t d = divisor;
-
- if (divisor > 0xffffffffULL) {
- unsigned int shift = fls(divisor >> 32);
-
- d = divisor >> shift;
- dividend >>= shift;
- }
-
- /* avoid 64 bit division if possible */
- if (dividend >> 32)
- do_div(dividend, d);
- else
- dividend = (uint32_t) dividend / d;
-
- return dividend;
-}
-
/*
* calculate the cubic root of x using Newton-Raphson
*/
diff --git a/net/ipv4/tcp_yeah.c b/net/ipv4/tcp_yeah.c
index 815e020e98fe..18355a2608e1 100644
--- a/net/ipv4/tcp_yeah.c
+++ b/net/ipv4/tcp_yeah.c
@@ -73,27 +73,6 @@ static void tcp_yeah_pkts_acked(struct sock *sk, u32 pkts_acked)
yeah->pkts_acked = pkts_acked;
}
-/* 64bit divisor, dividend and result. dynamic precision */
-static inline u64 div64_64(u64 dividend, u64 divisor)
-{
- u32 d = divisor;
-
- if (divisor > 0xffffffffULL) {
- unsigned int shift = fls(divisor >> 32);
-
- d = divisor >> shift;
- dividend >>= shift;
- }
-
- /* avoid 64 bit division if possible */
- if (dividend >> 32)
- do_div(dividend, d);
- else
- dividend = (u32) dividend / d;
-
- return dividend;
-}
-
static void tcp_yeah_cong_avoid(struct sock *sk, u32 ack,
u32 seq_rtt, u32 in_flight, int flag)
{
diff --git a/net/ipv4/tcp_yeah.h b/net/ipv4/tcp_yeah.h
index b3255dba4e2d..a62d82038fd0 100644
--- a/net/ipv4/tcp_yeah.h
+++ b/net/ipv4/tcp_yeah.h
@@ -2,6 +2,7 @@
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/inet_diag.h>
+#include <asm/div64.h>
#include <net/tcp.h>
diff --git a/net/netfilter/xt_connbytes.c b/net/netfilter/xt_connbytes.c
index 5e32dfa2668b..302043bc41b2 100644
--- a/net/netfilter/xt_connbytes.c
+++ b/net/netfilter/xt_connbytes.c
@@ -24,22 +24,6 @@ MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
MODULE_DESCRIPTION("iptables match for matching number of pkts/bytes per connection");
MODULE_ALIAS("ipt_connbytes");
-/* 64bit divisor, dividend and result. dynamic precision */
-static u_int64_t div64_64(u_int64_t dividend, u_int64_t divisor)
-{
- u_int32_t d = divisor;
-
- if (divisor > 0xffffffffULL) {
- unsigned int shift = fls(divisor >> 32);
-
- d = divisor >> shift;
- dividend >>= shift;
- }
-
- do_div(dividend, d);
- return dividend;
-}
-
static int
match(const struct sk_buff *skb,
const struct net_device *in,

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