vfs_bio.c revision 259200 breaks writing to tape drive on current

[Konstantin Belousov]

On Sun, Dec 22, 2013 at 09:54:49AM -0800, Manfred Antar wrote:
> The change to vfs_bio.c in revision 259200 breaks writing to scsi tape drive on i386 and sparc64 on current.
> I don't have any other machines to test on.
> here is example:
> 
> r259199:
> (/)4794}mt rew
> (/)4795}tar cvf /dev/sa0 kernel
> a kernel
> 
> r259200:
> (/)4781}mt rew
> (/)4782}tar cvf /dev/sa0 kernel
> a kerneltar: Write error
> 
> the changes between the two revisions:
> line 3682 removed:
> 
> bp->b_resid = bip->bio_resid;   /* XXX: remove */
> 
> I noticed this when trying to do a dump and getting end of tape error.
> tried different tape drives , different cables no change.
> backed out r259200 to 259199 and everything works as before.
> Manfred

Show me the kdump of the tar commands on both revisions.
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