Zong Li 4230e2deaa stop_machine, rcu: Mark functions as notrace ...

Some architectures assume that the stopped CPUs don't make function calls
to traceable functions when they are in the stopped state. See also commit
cb9d7fd51d ("watchdog: Mark watchdog touch functions as notrace").

Violating this assumption causes kernel crashes when switching tracer on
RISC-V.

Mark rcu_momentary_dyntick_idle() and stop_machine_yield() notrace to
prevent this.

Fixes: 4ecf0a43e7 ("processor: get rid of cpu_relax_yield")
Fixes: 366237e7b0 ("stop_machine: Provide RCU quiescent state in multi_cpu_stop()")
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Atish Patra <atish.patra@wdc.com>
Tested-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20201021073839.43935-1-zong.li@sifive.com

2020-10-26 12:12:27 +01:00

..

Kconfig

rcu: Reduce leaf fanout for strict RCU grace periods

2020-08-24 18:40:23 -07:00

Kconfig.debug

Merge branch 'strictgp.2020.08.24a' into HEAD

2020-09-03 09:47:42 -07:00

Makefile

rcuperf: Change rcuperf to rcuscale

2020-08-24 18:39:24 -07:00

rcu_segcblist.c

rcu/segcblist: Prevent useless GP start if no CBs to accelerate

2020-09-03 09:39:59 -07:00

rcu_segcblist.h

rcu: Remove kfree_rcu() special casing and lazy-callback handling

2020-01-24 10:24:31 -08:00

rcu.h

treewide: Make all debug_obj_descriptors const

2020-09-24 21:56:25 +02:00

rcuscale.c

rcuperf: Change rcuperf to rcuscale

2020-08-24 18:39:24 -07:00

rcutorture.c

rcutorture: Allow pointer leaks to test diagnostic code

2020-08-24 18:45:36 -07:00

refscale.c

refperf: Avoid null pointer dereference when buf fails to allocate

2020-08-24 18:45:35 -07:00

srcutiny.c

rcu: Use CONFIG_PREEMPTION where appropriate

2019-12-09 12:37:51 -08:00

srcutree.c

srcu: Remove KCSAN stubs

2020-08-24 18:36:03 -07:00

sync.c

rcu/sync: Simplify the state machine

2019-05-28 09:05:23 -07:00

tasks.h

rcu-tasks: Enclose task-list scan in rcu_read_lock()

2020-09-16 16:32:38 -07:00

tiny.c

rcu: Rename *_kfree_callback/*_kfree_rcu_offset/kfree_call_*

2020-06-29 11:59:25 -07:00

tree_exp.h

rcu: Initialize at declaration time in rcu_exp_handler()

2020-08-24 18:36:03 -07:00

tree_plugin.h

Merge branch 'strictgp.2020.08.24a' into HEAD

2020-09-03 09:47:42 -07:00

tree_stall.h

rcu: Add READ_ONCE() to rcu_do_batch() access to rcu_cpu_stall_ftrace_dump

2020-08-24 18:36:08 -07:00

tree.c

stop_machine, rcu: Mark functions as notrace

2020-10-26 12:12:27 +01:00

tree.h

Merge branch 'strictgp.2020.08.24a' into HEAD

2020-09-03 09:47:42 -07:00

update.c

Merge tag 'core-rcu-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2020-10-18 14:34:50 -07:00