rcu: Align the output of RCU CPU stall warning messages

Time stamps are added to the output in kernels built with
CONFIG_PRINTK_TIME=y, which causes misaligned output.  Therefore,
replace pr_cont() with pr_err(), which fixes alignment and gets
rid of a couple of despised pr_cont() calls.

Before:
[   37.567343] rcu: INFO: rcu_preempt self-detected stall on CPU
[   37.567839] rcu:     0-....: (1500 ticks this GP) idle=***
[   37.568270]  (t=1501 jiffies g=4717 q=28 ncpus=4)
[   37.568668] CPU: 0 PID: 313 Comm: test0 Not tainted 6.1.0-rc4 #8

After:
[   36.762074] rcu: INFO: rcu_preempt self-detected stall on CPU
[   36.762543] rcu:     0-....: (1499 ticks this GP) idle=***
[   36.763003] rcu:     (t=1500 jiffies g=5097 q=27 ncpus=4)
[   36.763522] CPU: 0 PID: 313 Comm: test0 Not tainted 6.1.0-rc4 #9

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/kernel/rcu/tree_stall.h b/kernel/rcu/tree_stall.h
index 6de15fb10bc476182d696df3c64a496f067ac2c3..f360894f5599d9d91ffb6393982132e65c3d6cda 100644 (file)
--- a/kernel/rcu/tree_stall.h
+++ b/kernel/rcu/tree_stall.h
@@ -619,7 +619,7 @@ static void print_other_cpu_stall(unsigned long gp_seq, unsigned long gps)
 
        for_each_possible_cpu(cpu)
                totqlen += rcu_get_n_cbs_cpu(cpu);
-       pr_cont("\t(detected by %d, t=%ld jiffies, g=%ld, q=%lu ncpus=%d)\n",
+       pr_err("\t(detected by %d, t=%ld jiffies, g=%ld, q=%lu ncpus=%d)\n",
               smp_processor_id(), (long)(jiffies - gps),
               (long)rcu_seq_current(&rcu_state.gp_seq), totqlen, rcu_state.n_online_cpus);
        if (ndetected) {
@@ -680,7 +680,7 @@ static void print_cpu_stall(unsigned long gps)
        raw_spin_unlock_irqrestore_rcu_node(rdp->mynode, flags);
        for_each_possible_cpu(cpu)
                totqlen += rcu_get_n_cbs_cpu(cpu);
-       pr_cont("\t(t=%lu jiffies g=%ld q=%lu ncpus=%d)\n",
+       pr_err("\t(t=%lu jiffies g=%ld q=%lu ncpus=%d)\n",
                jiffies - gps,
                (long)rcu_seq_current(&rcu_state.gp_seq), totqlen, rcu_state.n_online_cpus);