Re: Wrong operators for the binary.

[Jose Luis Alarcon <jlalarcon@tiggerfan.com>]

--- Tadeusz Andrzej Kadłubowski <yess@hell.org.pl> wrote:
>On Tue, Dec 03, 2002 at 11:52:03AM -0800, Jose Luis Alarcon wrote:
>>   Hi all.
>> 
>>   I am trying compile a module that contains this line:
>> 
>>      printk("Device: %d.%d\n", inode->i_rdev >> 8, inode->i_rdev & 0xFF);
>> 
>> and the result is that gcc 3.2.1 says that '>>' and '&' are wrong operators for
>> the binary. Why?
>
>My guess:
>i_rdev in inode structure is of type kdev_t, which is defined in
>include/linux/kdev_t.h and contains one member - unsigned short value. Maybe
>try shifting/bitwise anding not on the structure, but on that particular member
>of the structure.
>Then if inode is a pointer to the inode struct, then it would be something
>like:
>
>printk("Device: %d.%d\n", (inode->i_rdev).value >> 8, (inode->i_rdev) & 0xff);
>
>This guess obviously may occur wrong. Please tell, if it worked.
>-- 
>tadeusz a. kadlubowski
>

  Hi Tadeusz, and thanks for your answer.

  Your proposed line:

   printk("Device: %d.%d\n", (inode->i_rdev).value >> 8, (inode->i_rdev) & 0xff);

gets solve the problem for '>>' but not for '&'. I paste here down the output:

chardev.c:91: wrong operators for the binary &

  Why gcc think that & is a binary?. I suppose Ori Pomerantz use '>>' and '&' like
bits level operators.

  Thanks you, very much.

  Regards.

  Jose.

Debian GNU/Linux 'Sid' Kernel 2.4.19 Ext3.
ESware Linux 365 Kernel 2.5.49 ReiserFS.
Registered Linux User #213309.
Memories..... You are talking about memories.
Rick Deckard. Blade Runner.

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