Hi all, After merging the rcu tree, today's linux-next build (powercp allyesconfig) failed like this: ld: kernel/rcu/refperf.o:(.discard+0x0): multiple definition of `__pcpu_unique_srcu_ctl_perf_srcu_data'; kernel/rcu/rcuperf.o:(.discard+0x0): first defined here Caused by commit 786a25497743 ("refperf: Add a test to measure performance of read-side synchronization") From srcutree.h: * Note that although DEFINE_STATIC_SRCU() hides the name from other * files, the per-CPU variable rules nevertheless require that the * chosen name be globally unique. I have applied the following patch for today. From: Stephen Rothwell Date: Thu, 28 May 2020 18:57:17 +1000 Subject: [PATCH] refperf: uniqify name Signed-off-by: Stephen Rothwell --- kernel/rcu/refperf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/refperf.c b/kernel/rcu/refperf.c index 8c4a63257be9..47df72c492b3 100644 --- a/kernel/rcu/refperf.c +++ b/kernel/rcu/refperf.c @@ -133,8 +133,8 @@ static struct ref_perf_ops rcu_ops = { // Definitions for SRCU ref perf testing. -DEFINE_STATIC_SRCU(srcu_ctl_perf); -static struct srcu_struct *srcu_ctlp = &srcu_ctl_perf; +DEFINE_STATIC_SRCU(ref_srcu_ctl_perf); +static struct srcu_struct *srcu_ctlp = &ref_srcu_ctl_perf; static void srcu_ref_perf_read_section(int nloops) { -- 2.26.2 -- Cheers, Stephen Rothwell