[GIT pull] smp/urgent for v5.10-rc2

[Thomas Gleixner]

Linus,

please pull the latest smp/urgent branch from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 
smp-urgent-2020-11-01

up to:  4230e2deaa48: stop_machine, rcu: Mark functions as notrace


A single fix for stop machine. Mark functions no trace to prevent a crash
caused by recursion when enabling or disabling a tracer on RISC-V (probably
all architectures which patch through stop machine).


Thanks,

        tglx

------------------>
Zong Li (1):
      stop_machine, rcu: Mark functions as notrace


 kernel/rcu/tree.c     | 2 +-
 kernel/stop_machine.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 06895ef85d69..2a52f42f64b6 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -409,7 +409,7 @@ bool rcu_eqs_special_set(int cpu)
  *
  * The caller must have disabled interrupts and must not be idle.
  */
-void rcu_momentary_dyntick_idle(void)
+notrace void rcu_momentary_dyntick_idle(void)
 {
        int special;
 
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 865bb0228ab6..890b79cf0e7c 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -178,7 +178,7 @@ static void ack_state(struct multi_stop_data *msdata)
                set_state(msdata, msdata->state + 1);
 }
 
-void __weak stop_machine_yield(const struct cpumask *cpumask)
+notrace void __weak stop_machine_yield(const struct cpumask *cpumask)
 {
        cpu_relax();
 }