linux-kernel - Re: [PATCH 2/3] mg_disk: fix CONFIG

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Date:	Tue, 28 Apr 2009 17:28:57 +0200
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Mark Lord <liml@....ca>
Cc:	Tejun Heo <tj@...nel.org>, axboe@...nel.dk,
	linux-kernel@...r.kernel.org, donari75@...il.com,
	linux-ide@...r.kernel.org, alan@...rguk.ukuu.org.uk
Subject: Re: [PATCH 2/3] mg_disk: fix CONFIG_LBD=y warning

On Tuesday 28 April 2009 17:19:34 Mark Lord wrote:
> Tejun Heo wrote:
> > From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> > 
> > drivers/block/mg_disk.c: In function ‘mg_dump_status’:
> > drivers/block/mg_disk.c:265: warning: format ‘%ld’ expects type ‘long int’, but
> > argument 2 has type ‘sector_t’
> > 
> > [ Impact: kill build warning ]
> > 
> > Cc: unsik Kim <donari75@...il.com>
> > Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> > Signed-off-by: Tejun Heo <tj@...nel.org>
> > ---
> >  drivers/block/mg_disk.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> > 
> > diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
> > index d3e72ad..f389835 100644
> > --- a/drivers/block/mg_disk.c
> > +++ b/drivers/block/mg_disk.c
> > @@ -79,7 +79,7 @@ static void mg_dump_status(const char *msg, unsigned int stat,
> >  			if (host->breq) {
> >  				req = elv_next_request(host->breq);
> >  				if (req)
> > -					printk(", sector=%ld", req->sector);
> > +					printk(", sector=%u", (u32)req->sector);
> ..
> 
> Eh?  Shouldn't that be fixed the other way around, like this:
> 
>   +					printk(", sector=%llu", (u64)req->sector);
> 
> This way, it will still give correct data when sector_t is a u64.

shouldn't matter, req->sector is never > u32 for mg_disk
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