Re: linux-next: scsi tree build failure

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On Thu, 2009-04-02 at 07:22 -0700, James Bottomley wrote:
> cc: linux-scsi added
> 
> On Thu, 2009-04-02 at 16:49 +1100, Stephen Rothwell wrote:
> > Hi James,
> > 
> > Today's linux-next build (powerpc allyesconfig) failed like this:
> > 
> > drivers/scsi/fcoe/fcoe.c:982: error: __ksymtab_fcoe_fc_crc causes a section type conflict
> > drivers/scsi/fcoe/fcoe.c:982: error: __ksymtab_fcoe_fc_crc causes a section type conflict
> > 
> > Reverting commit 0c3cb56ec3321b23e9826cccf822470717be6e08 ("[SCSI] fcoe:
> > cleans up libfcoe.h and adds fcoe.h for fcoe module") makes the error go
> > away.  I have no idea why - the only clue is that the only global
> > declaration of fcoe_fc_crc() is removed by that commit.
> > 
> > Using a different compiler version (4.1.2) also fixed the problem.
> 
> Yes, that would be why I didn't see the issue.
> 
I built using gcc version 4.3.2 (on x86_64) and didn't see this either.

> > I also had to revert commits 60390544fcc212e0657cf1eea639691d09651943
> > ("[SCSI] fcoe, libfc: fix double fcoe_softc memory alloc") and
> > ba070644bff4390c965e99b1997f2cbec4157b46 ("[SCSI] fcoe, libfcoe: Add
> > support for FIP. FCoE discovery and keep-alive") since they followed the
> > one above.
> > 
> > I wonder if that function even needs to be exported as it is only used
> > withing the one file.
> 
> I think it's because the above commit removes the external declaration
> of fcoe_fc_crc ... so now we have an export symbol with no header
> defining it.  I think the correct patch is just not to export the
> symbol.
> 
> James
> 
> ---
> 
> diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
> index 5cdda6e..94e1e31 100644
> --- a/drivers/scsi/fcoe/fcoe.c
> +++ b/drivers/scsi/fcoe/fcoe.c
> @@ -979,7 +979,6 @@ u32 fcoe_fc_crc(struct fc_frame *fp)
>  	}
>  	return crc;
>  }
> -EXPORT_SYMBOL_GPL(fcoe_fc_crc);
>  
>  /**
>   * fcoe_xmit() - FCoE frame transmit function
> 
> 
How can we resolve this? Should we provide an updated patch without this
line or a new patch to remove the line?

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