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

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Message-ID: <20091218160100.GA6712@linux.vnet.ibm.com>
Date:	Fri, 18 Dec 2009 08:01:00 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Américo Wang <xiyou.wangcong@...il.com>
Cc:	"Mr. James W. Laferriere" <babydr@...y-dragons.com>,
	Linux Kernel Maillist <linux-kernel@...r.kernel.org>
Subject: 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 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");
 }
--
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