Hi Tejun, After merging the workqueues tree, today's linux-next build (arm multi_v7_defconfig) failed like this:
kernel/workqueue.c: In function 'unbound_pwq_by_node':
kernel/workqueue.c:570:2: error: implicit declaration of function
'rcu_lockdep_assert' [-Werror=implicit-function-declaration]
assert_rcu_or_wq_mutex_or_pool_mutex(wq);
^
kernel/workqueue.c:570:2: error: implicit declaration of function
'lockdep_is_held' [-Werror=implicit-function-declaration]
Caused by commit:
5b95e1af8d17 ("workqueue: wq_pool_mutex protects the attrs-installation")
from the workqueues tree interacting with commit:
eeacf8982637 ("rcu: Rename rcu_lockdep_assert() to RCU_LOCKDEP_WARN()")
from the rcu tree.
I applied the followinf merge fix patch:
From: Stephen Rothwell <s...@canb.auug.org.au>
Date: Sat, 20 Jun 2015 19:39:43 +1000
Subject: [PATCH] workqueue: fix up for rcu_lockdep_assert() rename
Signed-off-by: Stephen Rothwell <s...@canb.auug.org.au>
---
kernel/workqueue.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 837427cc5bdf..44cd4144ebcb 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -348,10 +348,10 @@ static void workqueue_sysfs_unregister(struct
workqueue_struct *wq);
"sched RCU or wq->mutex should be held")
#define assert_rcu_or_wq_mutex_or_pool_mutex(wq) \
- rcu_lockdep_assert(rcu_read_lock_sched_held() || \
- lockdep_is_held(&wq->mutex) || \
- lockdep_is_held(&wq_pool_mutex), \
- "sched RCU, wq->mutex or wq_pool_mutex should be
held")
+ RCU_LOCKDEP_WARN(!rcu_read_lock_sched_held() && \
+ !lockdep_is_held(&wq->mutex) && \
+ !lockdep_is_held(&wq_pool_mutex), \
+ "sched RCU, wq->mutex or wq_pool_mutex should be held")
#define for_each_cpu_worker_pool(pool, cpu) \
for ((pool) = &per_cpu(cpu_worker_pools, cpu)[0]; \
--
2.1.4
--
Cheers,
Stephen Rothwell s...@canb.auug.org.au
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