linux-kernel - Re: 2.6.23-rc7-mm1

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Message-ID: <20070925111520.GC8076@skynet.ie>
Date:	Tue, 25 Sep 2007 12:15:20 +0100
From:	mel@...net.ie (Mel Gorman)
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, neilb@...e.de,
	Geert.Uytterhoeven@...ycom.com, geoffrey.levand@...sony.com
Subject: Re: 2.6.23-rc7-mm1

On (25/09/07 12:31), Jens Axboe didst pronounce:
> On Tue, Sep 25 2007, Mel Gorman wrote:
> > On (25/09/07 01:11), Kamalesh Babulal didst pronounce:
> > 
> > Hi Kamalesh,
> > 
> > > The build fails with following error
> > > 
> > > CC drivers/block/ps3disk.o
> > > drivers/block/ps3disk.c: In function ???ps3disk_scatter_gather???:
> > > drivers/block/ps3disk.c:115: error: ???bio??? undeclared (first use in this
> > > function)
> > > drivers/block/ps3disk.c:115: error: (Each undeclared identifier is
> > > reported only once
> > > drivers/block/ps3disk.c:115: error: for each function it appears in.)
> > > drivers/block/ps3disk.c:115: error: ???j??? undeclared (first use in this
> > > function)
> > > drivers/block/ps3disk.c:116: error: implicit declaration of function
> > > ???bio_kunmap_bvec???
> > > make[2]: *** [drivers/block/ps3disk.o] Error 1
> > > make[1]: *** [drivers/block] Error 2
> > > make: *** [drivers] Error 2
> > > 
> > > The function bio_kunmap_bvec is missing.I tried checking the git-block.patch
> > > as well as the linux/kernel/git/axboe/linux-2.6-block.git and did not
> > > find this function.
> > > 
> > > Previously this function was replaced by __bio_kunmap_atomic();
> > > This patch does not solves the implicit "declaration of function
> > > ???bio_kunmap_bvec???"
> > > 
> > > Signed-off-by: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com
> > > <mailto:kamalesh@...ux.vnet.ibm.com>>
> > 
> > Your mailer appears to have mangled both your signoff and the whitespace in
> > the patch and it does not apply. However, fixing it does not solve the problem
> > because of this mysterious bio_kunmap_bvec() that is only referenced by this
> > driver. Was it accidently added during the addition of sg chaining support?
> 
> This should fix things up.
> 

This builds although I lack the hardware to really test it. However, in
2.6.23-rc8-mm1 it collides with git-block-ps3disk-fix.patch. This is a
version on top of that stack but I guess the best thing to do is replace
git-block-ps3disk-fix.patch with Jens patch once it is signed off.

Not signing off because this is just a rebase. Assuming the other one
gets signed off, consider it;

Acked-by: Mel Gorman <mel@....ul.ie>

--- 

diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.23-rc8-mm1-clean/drivers/block/ps3disk.c linux-2.6.23-rc8-mm1-fix-ps3disk/drivers/block/ps3disk.c
--- linux-2.6.23-rc8-mm1-clean/drivers/block/ps3disk.c	2007-09-25 12:05:40.000000000 +0100
+++ linux-2.6.23-rc8-mm1-fix-ps3disk/drivers/block/ps3disk.c	2007-09-25 12:09:19.000000000 +0100
@@ -106,14 +106,14 @@ static void ps3disk_scatter_gather(struc
 			(unsigned long)iter.bio->bi_sector);
 
 		size = bvec->bv_len;
-		buf = bvec_kmap_irq(bvec, flags);
+		buf = bvec_kmap_irq(bvec, &flags);
 		if (gather)
 			memcpy(dev->bounce_buf+offset, buf, size);
 		else
 			memcpy(buf, dev->bounce_buf+offset, size);
 		offset += size;
-		flush_kernel_dcache_page(bio_iovec_idx(iter.bio, iter.i)->bv_page);
-		bio_kunmap_bvec(bvec, flags);
+		flush_kernel_dcache_page(bvec->bv_page);
+		bvec_kunmap_irq(buf, &flags);
 		i++;
 	}
 }

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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