Message-ID: <20091218200839.GF6712@linux.vnet.ibm.com>
Date:	Fri, 18 Dec 2009 12:08:39 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	gregkh@...e.de
Cc:	stable@...nel.org, linux-kernel@...r.kernel.org, mingo@...e.hu
Subject: Fw: Re: [kernel] Re: kernel/rcutree.h:301: sorry, unimplemented:
	inlining failed in call to 'rcu_bootup_announce': function body not
	available

Hello, Greg,

Could you please consider the following commit for 2.6.32-stable?
It fixes a build error that some people are seeing.

							Thanx, Paul

dbe01350fa8ce0c11948ab7d6be71a4d901be151 rcu: Remove inline from forward-referenced functions

----- Forwarded message from "Mr. James W. Laferriere" <babydr@...y-dragons.com> -----

Date: Fri, 18 Dec 2009 10:05:46 -0900 (AKST)
From: "Mr. James W. Laferriere" <babydr@...y-dragons.com>
To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
cc: Américo Wang <xiyou.wangcong@...il.com>,
	Linux Kernel Maillist <linux-kernel@...r.kernel.org>
Subject: Re: [kernel] Re: kernel/rcutree.h:301: sorry, unimplemented: inlining
	failed in call to 'rcu_bootup_announce': function body not available

	Hello Paul ,

On Fri, 18 Dec 2009, Paul E. McKenney wrote:
> On Fri, Dec 18, 2009 at 09:08:00AM -0900, Mr. James W. Laferriere wrote:
>> On Fri, 18 Dec 2009, Paul E. McKenney wrote:
>>> On Fri, Dec 18, 2009 at 08:07:51AM -0900, Mr. James W. Laferriere wrote:
>>>> On Fri, 18 Dec 2009, Paul E. McKenney wrote:
>>>>> On Fri, Dec 18, 2009 at 05:52:51PM +0800, Américo Wang wrote:
>>>>>> On Fri, Dec 18, 2009 at 1:45 PM, Mr. James W. Laferriere
>>>>>> <babydr@...y-dragons.com> wrote:
>>>>>>>        Hello All ,
>>>>>>>
>>>>>>>  gcc -Wp,-MD,kernel/.rcutree.o.d  -nostdinc -isystem
>>>>>>> /usr/lib/gcc/i486-slackware-linux/3.4.6/include -Iinclude
>>>>>>> -I/usr/src/linux-2.6.32.1/arch/x86/include -include
>>>>>>> include/linux/autoconf.h
>>>>>>> -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs
>>>>>>> -fno-strict-aliasing -fno-common 
>>>>>>> -Werror-implicit-function-declaration
>>>>>>> -Wno-format-security -fno-delete-null-pointer-checks -O2 -m32
>>>>>>> -msoft-float
>>>>>>> -mregparm=3 -freg-struct-return -mpreferred-stack-boundary=2
>>>>>>> -fno-unit-at-a-time -march=i686 -ffreestanding -DCONFIG_AS_CFI=1 
>>>>>>> -pipe
>>>>>>> -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx
>>>>>>> -mno-sse2 -mno-3dnow -fno-omit-frame-pointer
>>>>>>> -fno-optimize-sibling-calls
>>>>>>> -g
>>>>>>> -Wdeclaration-after-statement   -D"KBUILD_STR(s)=#s"
>>>>>>> -D"KBUILD_BASENAME=KBUILD_STR(rcutree)"
>>>>>>>  -D"KBUILD_MODNAME=KBUILD_STR(rcutree)" -c -o kernel/rcutree.o
>>>>>>> kernel/rcutree.c
>>>>>>> kernel/rcutree.c: In function `__rcu_init':
>>>>>>> kernel/rcutree.h:301: sorry, unimplemented: inlining failed in call 
>>>>>>> to
>>>>>>> 'rcu_bootup_announce': function body not available
>>>>>>> kernel/rcutree.c:1740: sorry, unimplemented: called from here
>>>>>>> make[1]: *** [kernel/rcutree.o] Error 1
>>>>>>> make: *** [kernel] Error 2
>>>>>>>
>>>>>>>        There is no way ,  thru the 'make *config' methods to
>>>>>>> disable this
>>>>>>> broken stuff ,  So How may I get past this brokeness ?
>>>>>>>        And looking the posts for the 2.6.32-pre/rc the old rcu 
>>>>>>> has
>>>>>>> been
>>>>>>> trashed completely .  So I am not able to even try using that .
>>>>>>>
>>>>>>>        Would someone please shed some light on this .  I really
>>>>>>> need the
>>>>>>> updates for the Fusion/mpt driver & the changes in the /md/ tree as
>>>>>>> well
>>>>>>> .
>>>>>>
>>>>>> Hmm, I see the problem, but not sure how to fix it...
>>>>>>
>>>>>> Paul, why do we have #include "rcutree_plugin.h" at the bottom
>>>>>> of rcutree.c? This looks strange for me...
>>>>>>
>>>>>> How about moving it up? At least just move upper to rcu_init().
>>>>>
>>>>> Could you please apply commit 
>>>>> #dbe01350fa8ce0c11948ab7d6be71a4d901be151
>>>>> from Linus's git tree?  Corresponding diff attached.
>>>>>
>>>>> 							Thanx, Paul
>>>>>
>>>>> ------------------------------------------------------------------------
>>>>>
>>>>> diff --git a/kernel/rcutree.h b/kernel/rcutree.h
>>>>> index c1891c3..ddb79ec 100644
>>>>> --- a/kernel/rcutree.h
>>>>> +++ b/kernel/rcutree.h
>>>>> @@ -301,7 +301,7 @@ DECLARE_PER_CPU(struct rcu_data, 
>>>>> rcu_preempt_data);
>>>>> #else /* #ifdef RCU_TREE_NONCORE */
>>>>>
>>>>> /* Forward declarations for rcutree_plugin.h */
>>>>> -static inline void rcu_bootup_announce(void);
>>>>> +static void rcu_bootup_announce(void);
>>>>> long rcu_batches_completed(void);
>>>>> static void rcu_preempt_note_context_switch(int cpu);
>>>>> static int rcu_preempted_readers(struct rcu_node *rnp);
>>>>> diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
>>>>> index ef2a58c..c03edf7 100644
>>>>> --- a/kernel/rcutree_plugin.h
>>>>> +++ b/kernel/rcutree_plugin.h
>>>>> @@ -33,7 +33,7 @@ DEFINE_PER_CPU(struct rcu_data, rcu_preempt_data);
>>>>> /*
>>>>>  * Tell them what RCU they are running.
>>>>>  */
>>>>> -static inline void rcu_bootup_announce(void)
>>>>> +static void rcu_bootup_announce(void)
>>>>> {
>>>>> 	printk(KERN_INFO
>>>>> 	       "Experimental preemptable hierarchical RCU 
>>>>> implementation.\n");
>>>>> @@ -481,7 +481,7 @@ void exit_rcu(void)
>>>>> /*
>>>>>  * Tell them what RCU they are running.
>>>>>  */
>>>>> -static inline void rcu_bootup_announce(void)
>>>>> +static void rcu_bootup_announce(void)
>>>>> {
>>>>> 	printk(KERN_INFO "Hierarchical RCU implementation.\n");
>>>>> }
>>>>
>>>> 	Thank you & Americo for responding .
>>>>
>>>> 	Patch applied & same error as far as I can tell .
>>>> 	did
>>>>
>>>> 	make mrproper
>>>> 	cp ../old.config .config	(same as in previous email)
>>>> 	make oldconfig
>>>> 	( time make V=1 KBUILD_VERBOSE=1 INSTALL_PATH=/boot clean all install
>>>> modules_install ) >../linux-2.6.32.1d.log 2>&1
>>>> 	error'd (See below) ...
>>>>
>>>> 	If there is any further info I can provide or something I can do to
>>>> 	provide ,  Please request it .
>>>
>>> Hmmm....  Yes.  Could you please execute the following command from
>>> the top-level directory of your patched kernel source tree?
>>>
>>> 	grep rcu_bootup_announce kernel/rcu*
>>>
>>> I would expect the following output:
>>>
>>> 	kernel/rcutree.c:       rcu_bootup_announce();
>>> 	kernel/rcutree.h:static void rcu_bootup_announce(void);
>>> 	kernel/rcutree_plugin.h:static void __init rcu_bootup_announce(void)
>>> 	kernel/rcutree_plugin.h:static void __init rcu_bootup_announce(void)
>>>
>>> 							Thanx, Paul
>>
>> 	This is with your patch applied on top of linux-2.6.32.1.tar.gz
>> 	no other patches or additions .
>>
>> 	OK ,  it looks like I wandered right by the first file ie:
>> 'kernel/rcutree.h' so I need to patch that as well .  Doing this by hand 
>> as
>> the offending system is not online and all I have is serial console 
>> access
>> presently .
>> 	But ,  the last two you've changed to 'void __init' instead of just 
>> 'void'
>> .
>> 	Do you want me to add those changes to the file 
>> 'kernel/rcutree_plugin.h'
>> as well ?
>
> We were starting from different places.  The important thing is to
> remove the "inline" declarations.
	Ok ,  That was the very reason for why I asked this question .

>> # grep rcu_bootup_announce kernel/rcu*
>> kernel/rcutree.c:       rcu_bootup_announce();
>> kernel/rcutree.h:static inline void rcu_bootup_announce(void);
>
> The above "inline" needs to go as well.  (Ah, as you noted above.)
> Strange -- this change -was- in the patch I sent.
	I also mentioned not seeing the first file in the patch so I had to go 
back & edit it also .

>> kernel/rcutree_plugin.h:static void rcu_bootup_announce(void)
>> kernel/rcutree_plugin.h:static void rcu_bootup_announce(void)
>
> Does removing all three "inline" directives fix your build?
>
> 							Thanx, Paul
	Yes ,  Removing the 'inline's from all three locations gets me past the 
rcu error issue .  But now I am into errors in the code that I was really 
interested in getting 2.6.32 for are now error'ng .  I'll place those 
errors onto the list & other authors in another email .

	Thank you ,  for your efforts & the success .  JimL
-- 
+------------------------------------------------------------------+
| James   W.   Laferriere | System    Techniques | Give me VMS     |
| Network&System Engineer | 3237     Holden Road |  Give me Linux  |
| babydr@...y-dragons.com | Fairbanks, AK. 99709 |   only  on  AXP |
+------------------------------------------------------------------+


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