[rcu:rcu/next 5/78] kernel/rcutree.c:1131:41: error: 'flags' undeclared

[rcu:rcu/next 5/78] kernel/rcutree.c:1131:41: error: 'flags' undeclared

[Fengguang Wu]

Hi Paul,

FYI, kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head:   d58ab773ab8bc98c81c7d49c04bc88b6e7968385
commit: 552116942862340a4a0577cbac194ddc6185e4cb [5/78] rcu: Move RCU grace-period cleanup into kthread
config: x86_64-allmodconfig

All related error/warning messages:

kernel/rcutree.c: In function 'rcu_gp_kthread':
kernel/rcutree.c:1131:41: error: 'flags' undeclared (first use in this function)
kernel/rcutree.c:1131:41: note: each undeclared identifier is reported only once for each function it appears in
kernel/rcutree.c:1131:74: warning: comparison of distinct pointer types lacks a cast [enabled by default]
kernel/rcutree.c:1176:74: warning: comparison of distinct pointer types lacks a cast [enabled by default]

vim +1131 kernel/rcutree.c
  1125				if (!ACCESS_ONCE(rnp->qsmask) &&
  1126				    !rcu_preempt_blocked_readers_cgp(rnp))
  1127					break;
  1128				flush_signals(current);
  1129			}
  1130	
> 1131			raw_spin_lock_irqsave(&rnp->lock, flags);
  1132			gp_duration = jiffies - rsp->gp_start;
  1133			if (gp_duration > rsp->gp_max)
  1134				rsp->gp_max = gp_duration;

---
0-DAY kernel build testing backend         Open Source Technology Centre
Fengguang Wu, Yuanhan Liu                              Intel Corporation

Re: [rcu:rcu/next 5/78] kernel/rcutree.c:1131:41: error: 'flags' undeclared

[Paul E. McKenney]

On Fri, Sep 21, 2012 at 05:24:47AM +0800, Fengguang Wu wrote:
> Hi Paul,
> 
> FYI, kernel build failed on
> 
> tree:   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
> head:   d58ab773ab8bc98c81c7d49c04bc88b6e7968385
> commit: 552116942862340a4a0577cbac194ddc6185e4cb [5/78] rcu: Move RCU grace-period cleanup into kthread
> config: x86_64-allmodconfig
> 
> All related error/warning messages:
> 
> kernel/rcutree.c: In function 'rcu_gp_kthread':
> kernel/rcutree.c:1131:41: error: 'flags' undeclared (first use in this function)
> kernel/rcutree.c:1131:41: note: each undeclared identifier is reported only once for each function it appears in
> kernel/rcutree.c:1131:74: warning: comparison of distinct pointer types lacks a cast [enabled by default]
> kernel/rcutree.c:1176:74: warning: comparison of distinct pointer types lacks a cast [enabled by default]
> 
> vim +1131 kernel/rcutree.c
>   1125				if (!ACCESS_ONCE(rnp->qsmask) &&
>   1126				    !rcu_preempt_blocked_readers_cgp(rnp))
>   1127					break;
>   1128				flush_signals(current);
>   1129			}
>   1130	
> > 1131			raw_spin_lock_irqsave(&rnp->lock, flags);
>   1132			gp_duration = jiffies - rsp->gp_start;
>   1133			if (gp_duration > rsp->gp_max)
>   1134				rsp->gp_max = gp_duration;

<facepalm>

I clearly put the raw_spin_lock_irq() conversion in the wrong commit.
Fixing, will push the new version shortly.

							Thanx, Paul