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Date: Tue, 17 Apr 2012 13:14:31 -0700 From: Randy Dunlap <rdunlap@...otime.net> To: paulmck@...ux.vnet.ibm.com CC: Stephen Rothwell <sfr@...b.auug.org.au>, linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>, paul.gortmaker@...driver.com Subject: Re: linux-next: Tree for Apr 17 (rcu) On 04/17/2012 09:32 AM, Paul E. McKenney wrote: > On Tue, Apr 17, 2012 at 11:57:24AM -0700, Randy Dunlap wrote: >> On 04/16/2012 09:42 PM, Stephen Rothwell wrote: >> >>> Hi all, >>> >>> Changes since 20120416: >>> >>> The rcu tree lost its build failure. >> >> >> ERROR: "rcu_read_lock_nesting" [net/sctp/sctp.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/rds/rds.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/phonet/phonet.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/openvswitch/openvswitch.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/netfilter/xt_TCPMSS.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/netfilter/nfnetlink.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/netfilter/nf_conntrack.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/netfilter/ipset/ip_set.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/llc/llc2.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/l2tp/l2tp_ip.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/l2tp/l2tp_core.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/key/af_key.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/ipv4/ipip.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/decnet/decnet.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/core/netprio_cgroup.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/can/can.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/can/can-bcm.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/bridge/bridge.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/bluetooth/bluetooth.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/batman-adv/batman-adv.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [net/atm/atm.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [fs/gfs2/gfs2.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [drivers/net/vmxnet3/vmxnet3.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [drivers/input/joydev.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [drivers/char/tpm/tpm.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [drivers/char/ipmi/ipmi_msghandler.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [block/cfq-iosched.ko] undefined! >> ERROR: "rcu_read_lock_nesting" [block/blk-cgroup.ko] undefined! >> >> on i386. >> >> Full randconfig file is attached. > > Sigh! I failed to add the exports. Please see the following > not-yet-tested patch. > > Thanx, Paul > > ------------------------------------------------------------------------ > > rcu: Add exports for per-CPU variables used for inlining > > The new rcu_read_lock_nesting and rcu_read_unlock_special per-CPU > variables need to be accessible from modules to allow rcu_read_lock() > and rcu_read_unlock() to continue to be used from modules. This > commit therefore adds the needed EXPORT_PER_CPU_SYMBOL_GPL()s. > > Reported-by: Paul Gortmaker <paul.gortmaker@...driver.com> > Reported-by: Randy Dunlap <rdunlap@...otime.net> > Signed-off-by: Paul E. McKenney <paul.mckenney@...aro.org> > Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com> Works for me. Thanks. Acked-by: Randy Dunlap <rdunlap@...otime.net> > > diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c > index d52c68e..ef83774 100644 > --- a/kernel/rcupdate.c > +++ b/kernel/rcupdate.c > @@ -53,7 +53,9 @@ > > #ifdef CONFIG_PREEMPT_RCU > DEFINE_PER_CPU(int, rcu_read_lock_nesting); > +EXPORT_PER_CPU_SYMBOL_GPL(rcu_read_lock_nesting); > DEFINE_PER_CPU(int, rcu_read_unlock_special); > +EXPORT_PER_CPU_SYMBOL_GPL(rcu_read_unlock_special); > #ifdef CONFIG_PROVE_RCU > DEFINE_PER_CPU(struct task_struct *, rcu_current_task); > #endif /* #ifdef CONFIG_PROVE_RCU */ > -- ~Randy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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