linux-kernel - Re: 2.6.22: ERROR: "__ucmpdi2" [drivers/net/s2io.ko] undefined!

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Date:	Tue, 26 Jun 2007 00:01:32 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Sivakumar Subramani" <Sivakumar.Subramani@...erion.com>
Cc:	"Olaf Hering" <olaf@...fle.de>,
	"Stephen Hemminger" <shemminger@...ux-foundation.org>,
	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	"Leonid Grossman" <Leonid.Grossman@...erion.com>,
	"Rastapur Santosh" <santosh.rastapur@...erion.com>,
	"Ramkrishna Vepa" <ram.vepa@...erion.com>,
	"Sriram Rapuru" <Sriram.Rapuru@...erion.com>,
	"Sreenivasa Honnur" <Sreenivasa.Honnur@...erion.com>,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: 2.6.22: ERROR: "__ucmpdi2" [drivers/net/s2io.ko] undefined!

On Thu, 21 Jun 2007 05:55:13 -0400 "Sivakumar Subramani" <Sivakumar.Subramani@...erion.com> wrote:

> -----Original Message-----
> > From: netdev-owner@...r.kernel.org [mailto:netdev-owner@...r.kernel.org]
> > On Behalf Of Olaf Hering
> > Sent: Wednesday, June 20, 2007 2:11 AM
> > To: Stephen Hemminger
> > Cc: linux-kernel@...r.kernel.org; netdev@...r.kernel.org
> > Subject: Re: 2.6.22: ERROR: "__ucmpdi2" [drivers/net/s2io.ko] undefined!
> > 
> > On Tue, Jun 19, Stephen Hemminger wrote:
> > 
> > > On Tue, 19 Jun 2007 21:02:53 +0200
> > > Olaf Hering <olaf@...fle.de> wrote:
> > > 
> > > > 
> > > > What happend to __ucmpdi2 from David Woodhouse?
> > > > google has a few hits about stuff like this on 32bit powerpc with
> > gcc 4.1.2:
> > > > 
> > > > ERROR: "__ucmpdi2" [drivers/net/s2io.ko] undefined!
> > > > 
> > > > using the drivers/net/s2io* files from 2.6.21 with 2.6.22-rc5 fixes 
> > > > the compile.
> > > > 
> > > > 25805dcf9d83098cf5492117ad2669cd14cc9b24 adds two u64 >>= 48 
> > > > followed by a switch statement (line 2889 and 6816).
> > > 
> > > Probably the "switch(err) {" needs a cast to a smaller type (like u8).
> > 
> > This change removes the calls to __ucmpdi2.

(fixes quoting, fixes top-posting.  Please don't top-post).

> Hi,
> 
> We will include this fix in next set of patch submission. Thanks for the
> fix.
>
> ---
> >  drivers/net/s2io.c |   16 +++++++++-------
> >  1 file changed, 9 insertions(+), 7 deletions(-)
> > 
> > --- a/drivers/net/s2io.c
> > +++ b/drivers/net/s2io.c
> > @@ -2868,6 +2868,7 @@ static void tx_intr_handler(struct fifo_
> >  	struct tx_curr_get_info get_info, put_info;
> >  	struct sk_buff *skb;
> >  	struct TxD *txdlp;
> > +	u8 err_mask;
> >  
> >  	get_info = fifo_data->tx_curr_get_info;
> >  	memcpy(&put_info, &fifo_data->tx_curr_put_info,
> > sizeof(put_info)); @@ -2886,8 +2887,8 @@ static void
> > tx_intr_handler(struct fifo_
> >  			}
> >  
> >  			/* update t_code statistics */
> > -			err >>= 48;
> > -			switch(err) {
> > +			err_mask = err >> 48;
> > +			switch(err_mask) {
> >  				case 2:
> >  
> > nic->mac_control.stats_info->sw_stat.
> >  
> > tx_buf_abort_cnt++;
> > @@ -6805,6 +6806,7 @@ static int rx_osm_handler(struct ring_in
> >  	u16 l3_csum, l4_csum;
> >  	unsigned long long err = rxdp->Control_1 & RXD_T_CODE;
> >  	struct lro *lro;
> > +	u8 err_mask;
> >  
> >  	skb->dev = dev;
> >  
> > @@ -6813,8 +6815,8 @@ static int rx_osm_handler(struct ring_in
> >  		if (err & 0x1) {
> >  
> > sp->mac_control.stats_info->sw_stat.parity_err_cnt++;
> >  		}
> > -		err >>= 48;
> > -		switch(err) {
> > +		err_mask = err >> 48;
> > +		switch(err_mask) {
> >  			case 1:
> >  				sp->mac_control.stats_info->sw_stat.
> >  				rx_parity_err_cnt++;
> > @@ -6867,9 +6869,9 @@ static int rx_osm_handler(struct ring_in
> >  		* Note that in this case, since checksum will be
> > incorrect,
> >  		* stack will validate the same.
> >  		*/
> > -		if (err != 0x5) {
> > -			DBG_PRINT(ERR_DBG, "%s: Rx error Value:
> > 0x%llx\n",
> > -				dev->name, err);
> > +		if (err_mask != 0x5) {
> > +			DBG_PRINT(ERR_DBG, "%s: Rx error Value: 0x%x\n",
> > +				dev->name, err_mask);
> >  			sp->stats.rx_crc_errors++;
> >  			sp->mac_control.stats_info->sw_stat.mem_freed 
> >  				+= skb->truesize;
> 

This fix is still not present in anyone's tree and is required for
2.6.22.  Where are we up to with it?

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