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SubjectRe: [RFC] div64_64 support
On Fri, Feb 23, 2007 at 17:05:27 -0800, Stephen Hemminger wrote:
> Since there already two users of full 64 bit division in the kernel,
> and other places maybe hiding out as well. Add a full 64/64 bit divide.
>
> Yes this expensive, but there are places where it is necessary.
> It is not clear if doing the scaling buys any advantage on 64 bit platforms,
> so for them a full divide is done.

Still does not work after these fixes... how came?

WARNING: "div64_64" [net/netfilter/xt_connbytes.ko] undefined!
WARNING: "div64_64" [net/ipv4/tcp_cubic.ko] undefined!

--- linux-2.6.19/include/asm-i386/div64.h.bak 2006-11-29 23:57:37.000000000 +0200
+++ linux-2.6.19/include/asm-i386/div64.h 2007-02-24 16:24:55.822529880 +0200
@@ -45,4 +45,7 @@ div_ll_X_l_rem(long long divs, long div,
return dum2;

}
+
+extern uint64_t div64_64(uint64_t dividend, uint64_t divisor);
+
#endif
--- linux-2.6.19/lib/div64.c.bak 2007-02-24 16:10:03.686084000 +0200
+++ linux-2.6.19/lib/div64.c 2007-02-24 17:01:11.224517353 +0200
@@ -80,4 +80,6 @@ uint64_t div64_64(uint64_t dividend, uin
return dividend;
}

+EXPORT_SYMBOL(div64_64);
+
#endif /* BITS_PER_LONG == 32 */
--
-
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