linux-kernel - RE: [PATCH] cciss: Fix warnings during compilation under 32bit environment

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Message-ID: <226E1C65E4F6164E8EA5FD3CC913AE8CF461DE@G3W0639.americas.hpqcorp.net>
Date:	Thu, 19 Apr 2007 15:09:10 -0000
From:	"Miller, Mike (OS Dev)" <Mike.Miller@...com>
To:	"Hisashi Hifumi" <hifumi.hisashi@....ntt.co.jp>,
	<akpm@...ux-foundation.org>
Cc:	<jens.axboe@...cle.com>, <linux-kernel@...r.kernel.org>,
	<linux-scsi@...r.kernel.org>,
	"Cameron, Steve" <steve.cameron@...com>
Subject: RE: [PATCH] cciss: Fix warnings during compilation under 32bit  environment

 

> -----Original Message-----
> From: Hisashi Hifumi [mailto:hifumi.hisashi@....ntt.co.jp] 
> Sent: Wednesday, April 18, 2007 2:03 AM
> To: Miller, Mike (OS Dev); akpm@...ux-foundation.org
> Subject: [PATCH] cciss: Fix warnings during compilation under 
> 32bit environment
> 
> 
> Hi.
> 
> I fixed following warnings.
> 
> drivers/block/cciss.c: In function `do_cciss_request':
> drivers/block/cciss.c:2555: warning: right shift count >= 
> width of type
> drivers/block/cciss.c:2556: warning: right shift count >= 
> width of type
> drivers/block/cciss.c:2557: warning: right shift count >= 
> width of type
> drivers/block/cciss.c:2558: warning: right shift count >= 
> width of type
> 
> 
> Signed-off-by :Hisashi Hifumi <hifumi.hisashi@....ntt.co.jp>

Nak. You still haven't told where you saw these warnings. What compiler
are you using? I do not see these in my 32-bit environment.

mikem

> 
> 
> --- linux-2.6.21-rc7.org/drivers/block/cciss.c	2007-04-17 
> 16:36:02.000000000 +0900
> +++ linux-2.6.21-rc7/drivers/block/cciss.c	2007-04-17 
> 16:25:53.000000000 +0900
> @@ -2552,10 +2552,10 @@ static void do_cciss_request(request_que
>   	} else {
>   		c->Request.CDBLen = 16;
>   		c->Request.CDB[1]= 0;
> -		c->Request.CDB[2]= (start_blk >> 56) & 0xff;	//MSB
> -		c->Request.CDB[3]= (start_blk >> 48) & 0xff;
> -		c->Request.CDB[4]= (start_blk >> 40) & 0xff;
> -		c->Request.CDB[5]= (start_blk >> 32) & 0xff;
> +		c->Request.CDB[2]= sizeof(start_blk) > 4 ? 
> (start_blk >> 56) & 0xff : 0;	//MSB
> +		c->Request.CDB[3]= sizeof(start_blk) > 4 ? 
> (start_blk >> 48) & 0xff : 0;
> +		c->Request.CDB[4]= sizeof(start_blk) > 4 ? 
> (start_blk >> 40) & 0xff : 0;
> +		c->Request.CDB[5]= sizeof(start_blk) > 4 ? 
> (start_blk >> 32) & 0xff : 
> +0;
>   		c->Request.CDB[6]= (start_blk >> 24) & 0xff;
>   		c->Request.CDB[7]= (start_blk >> 16) & 0xff;
>   		c->Request.CDB[8]= (start_blk >>  8) & 0xff;
> 
> 
> 
> Thanks,
> 
-
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