linux-kernel - Re: [ORLinux] [PATCH 17/35] Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h [ver #2]

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Date:	Wed, 14 Mar 2012 15:43:02 +0100
From:	Jonas Bonn <jonas@...thpole.se>
To:	David Howells <dhowells@...hat.com>
Cc:	linux-arch@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	linux@...nrisc.net, linux-kernel@...r.kernel.org,
	paul.gortmaker@...driver.com, hpa@...or.com,
	torvalds@...ux-foundation.org
Subject: Re: [ORLinux] [PATCH 17/35] Make asm-generic/cmpxchg.h #include
 asm-generic/cmpxchg-local.h [ver #2]


On Wed, 2012-03-14 at 11:10 +0000, David Howells wrote:
> Jonas Bonn <jonas.bonn@...il.com> wrote:
> 
> > --- a/include/asm-generic/bitops/atomic.h
> > +++ b/include/asm-generic/bitops/atomic.h
> > @@ -2,7 +2,6 @@
> >  #define _ASM_GENERIC_BITOPS_ATOMIC_H_
> > 
> >  #include <asm/types.h>
> > -#include <asm/system.h>
> > 
> >  #ifdef CONFIG_SMP
> >  #include <asm/spinlock.h>
> 
> That's actually done in patch 33.  I wouldn't want to remove that if I can
> avoid it until after all the arches have been altered.

OK, fair enough.

Am I right in thinking that OpenRISC is the only architecture the
depends on the changes in asm-generic?  If yes, I could take this series
and hold off on the pull request until after the rest of your changes go
in.  Either way, it seems that OpenRISC will break for a bit...

The error I get while building (if asm/system.h is included) is a
circular dependency that I don't see that I can easily resolve:

  CC      arch/openrisc/kernel/asm-offsets.s
In file included from include/asm-generic/switch_to.h:17:0,
                 from arch/openrisc/include/generated/asm/switch_to.h:1,

from /home/jonas/openrisc/linux/arch/openrisc/include/asm/system.h:5,
                 from include/asm-generic/bitops/atomic.h:5,

from /home/jonas/openrisc/linux/arch/openrisc/include/asm/bitops.h:55,
                 from include/linux/bitops.h:22,
                 from include/linux/signal.h:38,
                 from arch/openrisc/kernel/asm-offsets.c:26:
include/linux/thread_info.h: In function ‘set_ti_thread_flag’:
include/linux/thread_info.h:64:2: error: implicit declaration of
function ‘set_bit’
include/linux/thread_info.h: In function ‘clear_ti_thread_flag’:
include/linux/thread_info.h:69:2: error: implicit declaration of
function ‘clear_bit’
include/linux/thread_info.h: In function ‘test_and_set_ti_thread_flag’:
include/linux/thread_info.h:74:2: error: implicit declaration of
function ‘test_and_set_bit’
include/linux/thread_info.h: In function
‘test_and_clear_ti_thread_flag’:
include/linux/thread_info.h:79:2: error: implicit declaration of
function ‘test_and_clear_bit’
include/linux/thread_info.h: In function ‘test_ti_thread_flag’:
include/linux/thread_info.h:84:2: error: implicit declaration of
function ‘test_bit’
In file included
from /home/jonas/openrisc/linux/arch/openrisc/include/asm/bitops.h:55:0,
                 from include/linux/bitops.h:22,
                 from include/linux/signal.h:38,
                 from arch/openrisc/kernel/asm-offsets.c:26:
include/asm-generic/bitops/atomic.h: At top level:
include/asm-generic/bitops/atomic.h:65:20: warning: conflicting types
for ‘set_bit’
include/asm-generic/bitops/atomic.h:65:20: error: static declaration of
‘set_bit’ follows non-static declaration
include/linux/thread_info.h:64:2: note: previous implicit declaration of
‘set_bit’ was here
include/asm-generic/bitops/atomic.h:86:20: warning: conflicting types
for ‘clear_bit’
include/asm-generic/bitops/atomic.h:86:20: error: static declaration of
‘clear_bit’ follows non-static declaration
include/linux/thread_info.h:69:2: note: previous implicit declaration of
‘clear_bit’ was here
include/asm-generic/bitops/atomic.h:127:19: error: static declaration of
‘test_and_set_bit’ follows non-static declaration
include/linux/thread_info.h:74:9: note: previous implicit declaration of
‘test_and_set_bit’ was here
include/asm-generic/bitops/atomic.h:151:19: error: static declaration of
‘test_and_clear_bit’ follows non-static declaration
include/linux/thread_info.h:79:9: note: previous implicit declaration of
‘test_and_clear_bit’ was here
In file included
from /home/jonas/openrisc/linux/arch/openrisc/include/asm/bitops.h:56:0,
                 from include/linux/bitops.h:22,
                 from include/linux/signal.h:38,
                 from arch/openrisc/kernel/asm-offsets.c:26:
include/asm-generic/bitops/non-atomic.h:103:19: error: static
declaration of ‘test_bit’ follows non-static declaration
include/linux/thread_info.h:84:9: note: previous implicit declaration of
‘test_bit’ was here
make[1]: *** [arch/openrisc/kernel/asm-offsets.s] Error 1
make: *** [prepare0] Error 2

/Jonas

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