[LAU] can't compile realtime kernel: error: conflicting types for ‘irqreturn_t’

[Emanuel Rumpf]

2009/5/7 Roberto Gordo Saez <roberto.gordo at gmail.com>:
> On Thu, May 07, 2009 at 07:51:58PM +0900, Dietrich Bollmann wrote:
>> Hi Roberto,
>>
>> Thanks for your answer - I disabled the comedi drivers and tried
>> again ... getting yet another error:
>>
>>
>>   CC [M]  lib/reed_solomon/reed_solomon.o
>>   CC [M]  lib/zlib_deflate/deflate.o
>>   CC [M]  lib/zlib_deflate/deftree.o
>>   CC [M]  lib/zlib_deflate/deflate_syms.o
>>   LD [M]  lib/zlib_deflate/zlib_deflate.o
>>   Building modules, stage 2.
>>   MODPOST 2283 modules
>> ERROR:
>> "there_is_no_init_MUTEX_LOCKED_for_RT_semaphores" [drivers/staging/rt2870/rt2870sta.ko] undefined!
>> WARNING: modpost: Found 1 section mismatch(es).
>
> Well it looks that this time the driver for wireless Ralink 2870
> devices is having problems with the -rt patch. Disabling it may help
> (unless you need it), or try the linux-rt-users mailing list at
> vger.kernel.org.
>
>> I hope some day the realtime kernel is delivered in form of a package
>> and there is no need for such emails anymore...
>
> There is linux-image-2.6.28-3-rt in Ubuntu (universe), but I don't use
> those packages so can't say how good are...
>

Hi

The fix likely is
to change from
    struct semaphore
to
    struct compat_semaphore

in  /drivers/staging/rt2870/rtmp.h


--
e.r.