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authorStanislaw Gruszka <sgruszka@redhat.com>2013-04-30 11:35:07 +0200
committerIngo Molnar <mingo@kernel.org>2013-04-30 19:13:05 +0200
commitf3002134158092178be81339ec5a22ff80e6c308 (patch)
treefe82b1e293e77b316b797ad2f477b508aa2c784f /lib
parent68aa8efcd1ab961e4684ef5af32f72a6ec1911de (diff)
downloadlinux-f3002134158092178be81339ec5a22ff80e6c308.tar.gz
Revert "math64: New div64_u64_rem helper"
This reverts commit f792685006274a850e6cc0ea9ade275ccdfc90bc. The cputime scaling code was changed/fixed and does not need the div64_u64_rem() primitive anymore. It has no other users, so let's remove them. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: rostedt@goodmis.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Dave Hansen <dave@sr71.net> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1367314507-9728-4-git-send-email-sgruszka@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/div64.c19
1 files changed, 6 insertions, 13 deletions
diff --git a/lib/div64.c b/lib/div64.c
index 3af5728d95f..a163b6caef7 100644
--- a/lib/div64.c
+++ b/lib/div64.c
@@ -79,10 +79,9 @@ EXPORT_SYMBOL(div_s64_rem);
#endif
/**
- * div64_u64_rem - unsigned 64bit divide with 64bit divisor and 64bit remainder
+ * div64_u64 - unsigned 64bit divide with 64bit divisor
* @dividend: 64bit dividend
* @divisor: 64bit divisor
- * @remainder: 64bit remainder
*
* This implementation is a modified version of the algorithm proposed
* by the book 'Hacker's Delight'. The original source and full proof
@@ -90,33 +89,27 @@ EXPORT_SYMBOL(div_s64_rem);
*
* 'http://www.hackersdelight.org/HDcode/newCode/divDouble.c.txt'
*/
-#ifndef div64_u64_rem
-u64 div64_u64_rem(u64 dividend, u64 divisor, u64 *remainder)
+#ifndef div64_u64
+u64 div64_u64(u64 dividend, u64 divisor)
{
u32 high = divisor >> 32;
u64 quot;
if (high == 0) {
- u32 rem32;
- quot = div_u64_rem(dividend, divisor, &rem32);
- *remainder = rem32;
+ quot = div_u64(dividend, divisor);
} else {
int n = 1 + fls(high);
quot = div_u64(dividend >> n, divisor >> n);
if (quot != 0)
quot--;
-
- *remainder = dividend - quot * divisor;
- if (*remainder >= divisor) {
+ if ((dividend - quot * divisor) >= divisor)
quot++;
- *remainder -= divisor;
- }
}
return quot;
}
-EXPORT_SYMBOL(div64_u64_rem);
+EXPORT_SYMBOL(div64_u64);
#endif
/**