linux-kernel - Re: [PATCH] kmemtrace: fix build breakage in befs

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Date:	Tue, 24 Mar 2009 10:07:57 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	eduard.munteanu@...ux360.ro, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kmemtrace: fix build breakage in befs


* Pekka Enberg <penberg@...helsinki.fi> wrote:

> On Tue, 2009-03-24 at 09:56 +0100, Ingo Molnar wrote:
> > * Pekka Enberg <penberg@...helsinki.fi> wrote:
> > 
> > > On Tue, 2009-03-24 at 09:51 +0100, Ingo Molnar wrote:
> > > > there's another build problem as well, in squashfs, and in key.h:
> > > > 
> > > >  include/linux/key.h:128: error: field 'sem' has incomplete type
> > > >  fs/squashfs/export.c:133: error: implicit declaration of function 'kmalloc'
> > > >  fs/squashfs/export.c:143: error: implicit declaration of function 'kfree'
> > > > 
> > > > And i suspect there's more as well. Is there really no unintrusive 
> > > > way to solve this - or do you think the RCU change reduces the 
> > > > include file spaghetti?
> > > 
> > > I don't think there is and yes, I do think the RCU change cleans 
> > > up things as well.
> > 
> > Okay. Note, you'll have to test tip:tracing/kmemtrace explicitly as 
> > i had to exclude it from tip:master due to test failures. Will put 
> > it back in once fixes arrive :)
> 
> That's what I am testing right now. It's just that I am working on 
> an old laptop where building the kernel takes a looong time.... 
> :-)

ok - let me help then.

On (64-bit) allyesconfig there's 5 distinct build failures:
 
include/linux/key.h:128: error: field ‘sem’ has incomplete type
distcc[22541] ERROR: compile security/keys/sysctl.c on a/16 failed

lib/decompress_bunzip2.c:636: error: implicit declaration of function ‘kmalloc’
lib/decompress_bunzip2.c:726: error: implicit declaration of function ‘kfree’

In file included from include/keys/user-type.h:16,
                 from fs/cifs/cifs_spnego.c:25:
include/linux/key.h:128: error: field ‘sem’ has incomplete type
distcc[3226] ERROR: compile fs/cifs/cifs_spnego.c on ph/16 failed

lib/decompress_inflate.c:45: error: implicit declaration of function ‘kmalloc’
lib/decompress_inflate.c:154: error: implicit declaration of function ‘kfree’

lib/decompress_unlzma.c:122: error: implicit declaration of function ‘kfree’
lib/decompress_unlzma.c:551: error: implicit declaration of function ‘kmalloc’

You should be able to reproduce them (on 32-bit too) one by one via:

  make lib/decompress_unlzma.o

etc. - without having to redo the full allyesconfig. (i'll redo that 
after the fixes, to flush out remaining/dependent bugs)

	Ingo
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