[DRBD-user] Redhat ES 3 compile error

Christian Kowarzik ckowarzik at email.de
Fri Aug 20 17:32:19 CEST 2004


Hi,

i just compiled again 2.4.21-15.0.4.EL and run into the same problem.

i then searched the page_count makro in the kernel tree and found it 
defined in mm_inline.h. So I added #include <linux/init.h> to 
drbd_main.c, drbd_receiver.c and drbd_worker.c.

Now everything compiles fine and modprobe drbd delivers no error :-)

Christian

p.s. I'm not a coder, so I hope, I did nothing stupid...

Lars Ellenberg wrote:

>/ 2004-07-26 17:19:49 -0400
>\ Kelly Opal:
>  
>
>>Hi
>>	I was digging through the compile and found these 2 warnings. I hope
>>this will help in finding the problem.
>>
>>drbd_worker.c: In function `w_e_end_rsdata_req':
>>drbd_worker.c:619: warning: implicit declaration of function
>>`page_count'
>>
>>drbd_receiver.c: In function `drbd_put_ee':
>>drbd_receiver.c:346: warning: implicit declaration of function
>>`page_count'
>>
>>This is the entry in the mm.h file 
>>
>>#define is_page_cache_freeable(page) (page_count(page) - !!page->buffers
>>== 1)
>>    
>>
>
>no. obviously the define of is_page_cache_freeable, not the define of
>page_count...
>
>  
>
>>So I put #include <linux/mm.h> in the drbd_reciever.c file as well.
>>    
>>
>you mean into drbd_worker.c (in the patch you quoted, I put it already
>into drbd_receiver.c).  ok.
>
>  
>
>>But
>>the problem persists.
>>    
>>
>
>as already stated: mm.h is already included implicitly.
>
>  
>
>>I also tried using 0.6.13 and got the same error.
>>I then tried it on RH Enterprise 3 Workstation and got the same thing.
>>
>>Hope this helps
>>    
>>
>
>it does not.
>I repeat.  page_count IS A MACRO.
>so go and find the definiton of that macro in you kernel source tree.
>or compile against kernel.org 2.4.whatever, or better 2.6
>(please do this anyways, just as an exercise :)
>
>
>	Lars Ellenberg
>
>  
>

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