Messages in this thread | | | Date | Wed, 7 Oct 2015 20:11:01 +0800 | From | kbuild test robot <> | Subject | Re: Re: [PATCH tip/core/rcu 02/18] rcu: Move rcu_report_exp_rnp() to allow consolidation |
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Hi Peter,
[auto build test WARNING on v4.3-rc4 -- if it's inappropriate base, please ignore]
config: i386-randconfig-x007-201540 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386
All warnings (new ones prefixed by >>):
kernel/rcu/tree.c: In function '_raw_spin_lock_irqsave_rcu_node': kernel/rcu/tree.c:1488:2: error: too many arguments to function '_raw_spin_lock_irqsave' _raw_spin_lock_irqsave(&rnp->lock, flags); ^ In file included from include/linux/spinlock.h:280:0, from kernel/rcu/tree.c:33: include/linux/spinlock_api_smp.h:34:26: note: declared here unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock) ^ kernel/rcu/tree.c: At top level: kernel/rcu/tree.c:1493:34: error: expected declaration specifiers or '...' before '(' token _raw_spin_lock_irqsave_rcu_node((rnp), &(flags)) ^ kernel/rcu/tree.c:1493:41: error: expected declaration specifiers or '...' before '&' token _raw_spin_lock_irqsave_rcu_node((rnp), &(flags)) ^ In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from kernel/rcu/tree.c:30: kernel/rcu/tree.c: In function 'note_gp_changes': kernel/rcu/tree.c:1807:7: error: implicit declaration of function 'raw_spin_trylock_rcu_node' [-Werror=implicit-function-declaration] !raw_spin_trylock_rcu_node(rnp)) { /* irqs already off, so later. */ ^ include/linux/compiler.h:147:28: note: in definition of macro '__trace_if' if (__builtin_constant_p((cond)) ? !!(cond) : \ ^ >> kernel/rcu/tree.c:1804:2: note: in expansion of macro 'if' if ((rdp->gpnum == READ_ONCE(rnp->gpnum) && ^ cc1: some warnings being treated as errors
vim +/if +1804 kernel/rcu/tree.c
5cd37193 kernel/rcu/tree.c Paul E. McKenney 2014-12-13 1788 rdp->rcu_qs_ctr_snap = __this_cpu_read(rcu_qs_ctr); 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1789 rdp->qs_pending = !!(rnp->qsmask & rdp->grpmask); 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1790 zero_cpu_stall_ticks(rdp); 7d0ae808 kernel/rcu/tree.c Paul E. McKenney 2015-03-03 1791 WRITE_ONCE(rdp->gpwrap, false); 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1792 } 48a7639c kernel/rcu/tree.c Paul E. McKenney 2014-03-11 1793 return ret; 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1794 } 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1795 d34ea322 kernel/rcutree.c Paul E. McKenney 2013-03-19 1796 static void note_gp_changes(struct rcu_state *rsp, struct rcu_data *rdp) 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1797 { 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1798 unsigned long flags; 48a7639c kernel/rcu/tree.c Paul E. McKenney 2014-03-11 1799 bool needwake; 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1800 struct rcu_node *rnp; 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1801 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1802 local_irq_save(flags); 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1803 rnp = rdp->mynode; 7d0ae808 kernel/rcu/tree.c Paul E. McKenney 2015-03-03 @1804 if ((rdp->gpnum == READ_ONCE(rnp->gpnum) && 7d0ae808 kernel/rcu/tree.c Paul E. McKenney 2015-03-03 1805 rdp->completed == READ_ONCE(rnp->completed) && 7d0ae808 kernel/rcu/tree.c Paul E. McKenney 2015-03-03 1806 !unlikely(READ_ONCE(rdp->gpwrap))) || /* w/out lock. */ 3538015d kernel/rcu/tree.c Peter Zijlstra 2015-10-07 1807 !raw_spin_trylock_rcu_node(rnp)) { /* irqs already off, so later. */ 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1808 local_irq_restore(flags); 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1809 return; 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1810 } 48a7639c kernel/rcu/tree.c Paul E. McKenney 2014-03-11 1811 needwake = __note_gp_changes(rsp, rnp, rdp); 6eaef633 kernel/rcutree.c Paul E. McKenney 2013-03-19 1812 raw_spin_unlock_irqrestore(&rnp->lock, flags);
:::::: The code at line 1804 was first introduced by commit :::::: 7d0ae8086b828311250c6afdf800b568ac9bd693 rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()
:::::: TO: Paul E. McKenney <paulmck@linux.vnet.ibm.com> :::::: CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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