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Message-ID: <20101021181220.GA8827@redhat.com> Date: Thu, 21 Oct 2010 20:12:20 +0200 From: Oleg Nesterov <oleg@...hat.com> To: Brian Behlendorf <behlendorf1@...l.gov> Cc: LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH] Make div64_u64() precise on 32bit platforms Andrew, please drop lib-div64c-document-that-div64_u64-is-not-precise-on-32bit-platforms.patch On 10/21, Brian Behlendorf wrote: > > I think we should use your simpler version. There's no good reason to > make this more complicated than it needs to be. I haven't been able to > find a test case where your changes get the wrong result. Great! > From: Brian Behlendorf <behlendorf1@...l.gov> > Date: Thu, 5 Aug 2010 14:59:11 -0700 > Subject: [PATCH] Fix div64_u64 for 32bit platforms > > The current implementation of div64_u64 for 32bit systems returns > an approximately correct result when the divisor exceeds 32bits. > Since doing 64bit division using 32bit hardware is a long since > solved problem we just use one of the existing proven methods. Brian, you forgot to add your sob. Hopefully Andrew can add Signed-off-by: Brian Behlendorf <behlendorf1@...l.gov> Signed-off-by: Oleg Nesterov <oleg@...hat.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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