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rename div64_64 to div64_u64

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Rename div64_64 to div64_u64 to make it consistent with the other divide
functions, so it clearly includes the type of the divide.  Move its definition
to math64.h as currently no architecture overrides the generic implementation.
 They can still override it of course, but the duplicated declarations are
avoided.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: Avi Kivity <avi@qumranet.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roman Zippel 2008-05-01 04:34:28 -07:00 committed by Linus Torvalds
parent 71abb3af62
commit 6f6d6a1a6a
16 changed files with 34 additions and 46 deletions
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3
arch/ia64/kvm/kvm-ia64.c
View file

@ -1,4 +1,3 @@
/*
* kvm_ia64.c: Basic KVM suppport On Itanium series processors
*
@ -431,7 +430,7 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu)
if (itc_diff < 0)
itc_diff = -itc_diff;
expires = div64_64(itc_diff, cyc_per_usec);
expires = div64_u64(itc_diff, cyc_per_usec);
kt = ktime_set(0, 1000 * expires);
vcpu->arch.ht_active = 1;
hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);

6
arch/x86/kvm/i8254.c
View file

@ -35,7 +35,7 @@
#include "i8254.h"
#ifndef CONFIG_X86_64
#define mod_64(x, y) ((x) - (y) * div64_64(x, y))
#define mod_64(x, y) ((x) - (y) * div64_u64(x, y))
#else
#define mod_64(x, y) ((x) % (y))
#endif
@ -60,8 +60,8 @@ static u64 muldiv64(u64 a, u32 b, u32 c)
rl = (u64)u.l.low * (u64)b;
rh = (u64)u.l.high * (u64)b;
rh += (rl >> 32);
res.l.high = div64_64(rh, c);
res.l.low = div64_64(((mod_64(rh, c) << 32) + (rl & 0xffffffff)), c);
res.l.high = div64_u64(rh, c);
res.l.low = div64_u64(((mod_64(rh, c) << 32) + (rl & 0xffffffff)), c);
return res.ll;
}

6
arch/x86/kvm/lapic.c
View file

@ -25,13 +25,13 @@
#include <linux/hrtimer.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/math64.h>
#include <asm/processor.h>
#include <asm/msr.h>
#include <asm/page.h>
#include <asm/current.h>
#include <asm/apicdef.h>
#include <asm/atomic.h>
#include <asm/div64.h>
#include "irq.h"
#define PRId64 "d"
@ -526,8 +526,8 @@ static u32 apic_get_tmcct(struct kvm_lapic *apic)
} else
passed = ktime_sub(now, apic->timer.last_update);
counter_passed = div64_64(ktime_to_ns(passed),
(APIC_BUS_CYCLE_NS * apic->timer.divide_count));
counter_passed = div64_u64(ktime_to_ns(passed),
(APIC_BUS_CYCLE_NS * apic->timer.divide_count));
if (counter_passed > tmcct) {
if (unlikely(!apic_lvtt_period(apic))) {

2
include/asm-arm/div64.h
View file

@ -224,6 +224,4 @@
#endif
extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif

7
include/asm-generic/div64.h
View file

@ -30,11 +30,6 @@
__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);
@ -54,8 +49,6 @@ 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

1
include/asm-m68k/div64.h
View file

@ -25,5 +25,4 @@
__rem; \
})
extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif /* _M68K_DIV64_H */

6
include/asm-mips/div64.h
View file

@ -82,7 +82,6 @@
(n) = __quot; \
__mod; })
extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif /* (_MIPS_SZLONG == 32) */
#if (_MIPS_SZLONG == 64)
@ -106,11 +105,6 @@ extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
(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 */

3
include/asm-mn10300/div64.h
View file

@ -97,7 +97,4 @@ signed __muldiv64s(signed val, signed mult, signed div)
return result;
}
extern __attribute__((const))
uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif /* _ASM_DIV64 */

1
include/asm-um/div64.h
View file

@ -3,5 +3,4 @@
#include "asm/arch/div64.h"
extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#endif

2
include/asm-x86/div64.h
View file

@ -71,8 +71,6 @@ static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
}
#define div_u64_rem div_u64_rem
extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
#else
# include <asm-generic/div64.h>
#endif /* CONFIG_X86_32 */

12
include/linux/math64.h
View file

@ -27,6 +27,14 @@ static inline s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder)
return dividend / divisor;
}
/**
* div64_u64 - unsigned 64bit divide with 64bit divisor
*/
static inline u64 div64_u64(u64 dividend, u64 divisor)
{
return dividend / divisor;
}
#elif BITS_PER_LONG == 32
#ifndef div_u64_rem
@ -41,6 +49,10 @@ static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
extern s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder);
#endif
#ifndef div64_u64
extern u64 div64_u64(u64 dividend, u64 divisor);
#endif
#endif /* BITS_PER_LONG */
/**

6
kernel/sched.c
View file

@ -8025,7 +8025,7 @@ static void init_tg_cfs_entry(struct task_group *tg, struct cfs_rq *cfs_rq,
se->my_q = cfs_rq;
se->load.weight = tg->shares;
se->load.inv_weight = div64_64(1ULL<<32, se->load.weight);
se->load.inv_weight = div64_u64(1ULL<<32, se->load.weight);
se->parent = parent;
}
#endif
@ -8692,7 +8692,7 @@ static void __set_se_shares(struct sched_entity *se, unsigned long shares)
dequeue_entity(cfs_rq, se, 0);
se->load.weight = shares;
se->load.inv_weight = div64_64((1ULL<<32), shares);
se->load.inv_weight = div64_u64((1ULL<<32), shares);
if (on_rq)
enqueue_entity(cfs_rq, se, 0);
@ -8787,7 +8787,7 @@ static unsigned long to_ratio(u64 period, u64 runtime)
if (runtime == RUNTIME_INF)
return 1ULL << 16;
return div64_64(runtime << 16, period);
return div64_u64(runtime << 16, period);
}
#ifdef CONFIG_CGROUP_SCHED

4
kernel/sched_debug.c
View file

@ -357,8 +357,8 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
avg_per_cpu = p->se.sum_exec_runtime;
if (p->se.nr_migrations) {
avg_per_cpu = div64_64(avg_per_cpu,
p->se.nr_migrations);
avg_per_cpu = div64_u64(avg_per_cpu,
p->se.nr_migrations);
} else {
avg_per_cpu = -1LL;
}

12
lib/div64.c
View file

@ -78,9 +78,10 @@ EXPORT_SYMBOL(div_s64_rem);
#endif
/* 64bit divisor, dividend and result. dynamic precision */
uint64_t div64_64(uint64_t dividend, uint64_t divisor)
#ifndef div64_u64
u64 div64_u64(u64 dividend, u64 divisor)
{
uint32_t high, d;
u32 high, d;
high = divisor >> 32;
if (high) {
@ -91,10 +92,9 @@ uint64_t div64_64(uint64_t dividend, uint64_t divisor)
} else
d = divisor;
do_div(dividend, d);
return dividend;
return div_u64(dividend, d);
}
EXPORT_SYMBOL(div64_64);
EXPORT_SYMBOL(div64_u64);
#endif
#endif /* BITS_PER_LONG == 32 */

4
net/ipv4/tcp_cubic.c
View file

@ -15,8 +15,8 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/math64.h>
#include <net/tcp.h>
#include <asm/div64.h>
#define BICTCP_BETA_SCALE 1024 /* Scale factor beta calculation
* max_cwnd = snd_cwnd * beta
@ -128,7 +128,7 @@ static u32 cubic_root(u64 a)
* x = ( 2 * x + a / x ) / 3
* k+1 k k
*/
x = (2 * x + (u32)div64_64(a, (u64)x * (u64)(x - 1)));
x = (2 * x + (u32)div64_u64(a, (u64)x * (u64)(x - 1)));
x = ((x * 341) >> 10);
return x;
}

5
net/netfilter/xt_connbytes.c
View file

@ -4,12 +4,11 @@
#include <linux/module.h>
#include <linux/bitops.h>
#include <linux/skbuff.h>
#include <linux/math64.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_connbytes.h>
#include <net/netfilter/nf_conntrack.h>
#include <asm/div64.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
MODULE_DESCRIPTION("Xtables: Number of packets/bytes per connection matching");
@ -82,7 +81,7 @@ connbytes_mt(const struct sk_buff *skb, const struct net_device *in,
break;
}
if (pkts != 0)
what = div64_64(bytes, pkts);
what = div64_u64(bytes, pkts);
break;
}