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Date: Fri, 24 Apr 2020 08:05:34 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: Geert Uytterhoeven <geert@...ux-m68k.org>, Pravin B Shelar <pshelar@....org>, "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Tonghao Zhang <xiangxia.m.yue@...il.com> Cc: netdev@...r.kernel.org, dev@...nvswitch.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] net: openvswitch: use do_div() for 64-by-32 divisions: On 4/24/20 5:10 AM, Geert Uytterhoeven wrote: > On 32-bit architectures (e.g. m68k): > > ERROR: modpost: "__udivdi3" [net/openvswitch/openvswitch.ko] undefined! > ERROR: modpost: "__divdi3" [net/openvswitch/openvswitch.ko] undefined! > > Fixes: e57358873bb5d6ca ("net: openvswitch: use u64 for meter bucket") > Reported-by: noreply@...erman.id.au > Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org> > --- > net/openvswitch/meter.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c > index 915f31123f235c03..3498a5ab092ab2b8 100644 > --- a/net/openvswitch/meter.c > +++ b/net/openvswitch/meter.c > @@ -393,7 +393,7 @@ static struct dp_meter *dp_meter_create(struct nlattr **a) > * Start with a full bucket. > */ > band->bucket = (band->burst_size + band->rate) * 1000ULL; > - band_max_delta_t = band->bucket / band->rate; > + band_max_delta_t = do_div(band->bucket, band->rate); > if (band_max_delta_t > meter->max_delta_t) > meter->max_delta_t = band_max_delta_t; > band++; > This is fascinating... Have you tested this patch ? Please double check what do_div() return value is supposed to be ! Thanks.
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