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remove div_long_long_rem

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x86 is the only arch right now, which provides an optimized for
div_long_long_rem and it has the downside that one has to be very careful that
the divide doesn't overflow.

The API is a little akward, as the arguments for the unsigned divide are
signed.  The signed version also doesn't handle a negative divisor and
produces worse code on 64bit archs.

There is little incentive to keep this API alive, so this converts the few
users to the new API.

Signed-off-by: Roman Zippel <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: john stultz <[email protected]>
Cc: Christoph Lameter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Roman Zippel 2008-05-01 04:34:31 -07:00 • committed by Linus Torvalds
commit f8bd2258e2
10 changed files with 44 additions and 110 deletions
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9
mm/slub.c
View file

@ -22,6 +22,7 @@
#include <linux/debugobjects.h>
#include <linux/kallsyms.h>
#include <linux/memory.h>
#include <linux/math64.h>
/*
* Lock order:
@ -3621,12 +3622,10 @@ static int list_locations(struct kmem_cache *s, char *buf,
len += sprintf(buf + len, "<not-available>");
if (l->sum_time != l->min_time) {
unsigned long remainder;
len += sprintf(buf + len, " age=%ld/%ld/%ld",
l->min_time,
div_long_long_rem(l->sum_time, l->count, &remainder),
l->max_time);
l->min_time,
(long)div_u64(l->sum_time, l->count),
l->max_time);
} else
len += sprintf(buf + len, " age=%ld",
l->min_time);