linux-kernel - Re: [kernel] Re: kernel/rcutree.h:301: sorry, unimplemented: inlining failed in call to 'rcu_bootup

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Date:	Fri, 18 Dec 2009 10:36:33 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	"Mr. James W. Laferriere" <babydr@...y-dragons.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

On Fri, Dec 18, 2009 at 09:08:00AM -0900, Mr. James W. Laferriere wrote:
> 	Hello Paul ,
>
> 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.

> # 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.

> 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

> 		Tia ,  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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