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Date:	Thu, 11 Nov 2010 12:07:10 -0500
From:	"John W. Linville" <linville@...driver.com>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	Arnd Hannemann <arnd@...dnet.de>,
	"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

On Thu, Nov 11, 2010 at 11:06:32AM -0600, Larry Finger wrote:
> On 11/11/2010 10:35 AM, John W. Linville wrote:
> > On Mon, Oct 25, 2010 at 10:13:06PM +0200, Arnd Hannemann wrote:
> >> 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
> > 
> > Is this issue resolved?  Should I be expecting a b43 patch?
> 
> I don't know if a similar patch for b43 is needed. I tried to set up a cross
> compiler for ARM. My initial attempt failed and I did not have time to explore
> the situation. If anyone has links to a cross-compiler solution for x86_64 on
> openSUSE, please let me know.

Sorry, I mean b43legacy -- will there be a formal patch?

-- 
John W. Linville		Someday the world will need a hero, and you
linville@...driver.com			might be all we have.  Be ready.
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