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From: Harry Wei <jiaweiwei.xiyou@gmail.com>
To: Connor Hansen <cmdkhh@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH RESEND]Remove a warning for drivers/edac/i82975x_edac.c
Date: Fri, 10 Jun 2011 13:07:50 +0800	[thread overview]
Message-ID: <20110610050747.GA3643@gmail.com> (raw)
In-Reply-To: <BANLkTin-iC8HFm2dmCmRTfYcBDDRbjZnFw@mail.gmail.com>

On Wed, Jun 08, 2011 at 11:17:21PM -0700, Connor Hansen wrote:
> 
> this is not what the code you are changing does.
> 
> the code is not assigned that value, its or'd with it.
> 
> a test would be more like.
> 
> #include <stdio.h>
> int main()
> {
>         unsigned long page;  //page
>         unsigned int b = 5;  //info->eap is u32 = unsigned int
>                                        // typedef unsigned int __u32;
>         page = (unsigned long) b;
>         page |= 0x10000000ul;
> 
>         printf("%lu\n",page);
> 
>         return 0;
> }
> 
> This produces no warning.
> $ gcc -g test.c && ./a.out
> 268435461
> $
> 
> 0x10000000
> 10000000000000000000000000000
> 5
> 00000000000000000000000000101
> 0x10000000 | 5 =
> 10000000000000000000000000101
> 268435461
> 
> I am green to kernel development so I will wait for someone with a bit
> more knowledge to
> chime in, or verify this warning.
> Connor

You are right, but it really has warnings yet.
My PC is also 32-bits.

Thanks
Harry Wei

  reply	other threads:[~2011-06-10  5:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-09  3:04 [PATCH RESEND]Remove a warning for drivers/edac/i82975x_edac.c Harry Wei
2011-06-09  4:26 ` Connor Hansen
2011-06-09  5:25   ` Harry Wei
2011-06-09  6:17     ` Connor Hansen
2011-06-10  5:07       ` Harry Wei [this message]
2011-06-09 16:35   ` Randy Dunlap
2011-06-09 17:37 ` Randy Dunlap
2011-06-10  5:20   ` Harry Wei
2011-06-10  6:42     ` Connor Hansen
2011-06-12 15:50       ` Arvind R

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