netdev - Re: [PATCH] net: b43legacy: fix compile error

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Date:	Mon, 25 Oct 2010 22:13:06 +0200
From:	Arnd Hannemann <arnd@...dnet.de>
To:	Larry Finger <Larry.Finger@...inger.net>
CC:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH] net: b43legacy: fix compile error

Am 25.10.2010 20:59, schrieb Larry Finger:
> On 10/25/2010 01:44 PM, Arnd Hannemann wrote:
>> Am 25.10.2010 20:36, schrieb Larry Finger:
>>> On 10/25/2010 01:26 PM, Arnd Hannemann wrote:
>>>> Am 25.10.2010 17:32, schrieb Larry Finger:
>>>>> On 10/25/2010 09:41 AM, Arnd Hannemann wrote:
>>>>>> On todays linus tree the following compile error happened to me:
>>>>>>
>>>>>>   CC [M]  drivers/net/wireless/b43legacy/xmit.o
>>>>>> In file included from include/net/dst.h:11,
>>>>>>                  from drivers/net/wireless/b43legacy/xmit.c:31:
>>>>>> include/net/dst_ops.h:28: error: expected ':', ',', ';', '}' or '__attribute__' before '____cacheline_aligned_in_smp'
>>>>>> include/net/dst_ops.h: In function 'dst_entries_get_fast':
>>>>>> include/net/dst_ops.h:33: error: 'struct dst_ops' has no member named 'pcpuc_entries'
>>>>>> include/net/dst_ops.h: In function 'dst_entries_get_slow':
>>>>>> include/net/dst_ops.h:41: error: 'struct dst_ops' has no member named 'pcpuc_entries'
>>>>>> include/net/dst_ops.h: In function 'dst_entries_add':
>>>>>> include/net/dst_ops.h:49: error: 'struct dst_ops' has no member named 'pcpuc_entries'
>>>>>> include/net/dst_ops.h: In function 'dst_entries_init':
>>>>>> include/net/dst_ops.h:55: error: 'struct dst_ops' has no member named 'pcpuc_entries'
>>>>>> include/net/dst_ops.h: In function 'dst_entries_destroy':
>>>>>> include/net/dst_ops.h:60: error: 'struct dst_ops' has no member named 'pcpuc_entries'
>>>>>> make[4]: *** [drivers/net/wireless/b43legacy/xmit.o] Error 1
>>>>>> make[3]: *** [drivers/net/wireless/b43legacy] Error 2
>>>>>> make[2]: *** [drivers/net/wireless] Error 2
>>>>>> make[1]: *** [drivers/net] Error 2
>>>>>> make: *** [drivers] Error 2
>>>>>>
>>>>>> This patch fixes this issue by adding "linux/cache.h" as an include to
>>>>>> "include/net/dst_ops.h".
>>>>>
>>>>> Strange. Compiling b43legacy from the linux-2.6.git tree (git describe is
>>>>> v2.6.36-4464-g229aebb) works fine on x86_64. I wonder what is different.
>>>>
>>>> Exactly the same git describe here.
>>>> Maybe your arch includes cache.h already, in my case its a compile for ARM (shmobile).
>>>
>>> That probably makes the difference. Using Eric's fix that removes the #include
>>> <linux/dst.h> should be better. Does it work for you?
>>>
>>> There are probably a lot more of the system includes that may not be needed. If
>>> I send you a patch removing them, could you test?
>>
>> As it turns out my card is not supported by b43legacy, but compilation testing,
>> sure I can test that.
> 
> If it is a Broadcom card, it is likely handled by b43.

Yes. It seems it should work with b43 (its an SDIO card) and it almost does...

> Attached is a trial removal of a number of include statements. Does it compile?

Nope:
NSTALL_MOD_PATH=/home/arnd/projekte/renesas-2/nfs modules
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
make[1]: `include/generated/mach-types.h' is up to date.
  CALL    scripts/checksyscalls.sh
  CC [M]  drivers/net/wireless/b43legacy/main.o
drivers/net/wireless/b43legacy/main.c: In function 'b43legacy_upload_microcode':
drivers/net/wireless/b43legacy/main.c:1688: error: implicit declaration of function 'signal_pending'
make[4]: *** [drivers/net/wireless/b43legacy/main.o] Error 1
make[3]: *** [drivers/net/wireless/b43legacy] Error 2
make[2]: *** [drivers/net/wireless] Error 2
make[1]: *** [drivers/net] Error 2
make: *** [drivers] Error 2

Thanks,
Arnd
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