[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>

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,