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Peter Zijlstra af756be29c rcu: Always inline rcu_dynticks_task*_{enter,exit}() 
[ Upstream commit 7663ad9a5dbcc27f3090e6bfd192c7e59222709f ]

RCU managed to grow a few noinstr violations:

  vmlinux.o: warning: objtool: rcu_dynticks_eqs_enter()+0x0: call to rcu_dynticks_task_trace_enter() leaves .noinstr.text section
  vmlinux.o: warning: objtool: rcu_dynticks_eqs_exit()+0xe: call to rcu_dynticks_task_trace_exit() leaves .noinstr.text section

Fix them by adding __always_inline to the relevant trivial functions.

Also replace the noinstr with __always_inline for the existing
rcu_dynticks_task_*() functions since noinstr would force noinline
them, even when empty, which seems silly.

Fixes: 7d0c9c50c5 ("rcu-tasks: Avoid IPIing userspace/idle tasks if kernel is so built")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-11-18 14:04:06 +01:00
..
Kconfig
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Kconfig.debug
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Makefile
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rcu.h srcu: Fix broken node geometry after early ssp init 2021-07-20 16:05:38 +02:00
rcu_segcblist.c
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rcu_segcblist.h
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rcuscale.c
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rcutorture.c rcutorture: Avoid problematic critical section nesting on PREEMPT_RT 2021-11-18 14:03:52 +01:00
refscale.c
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srcutiny.c srcu: Provide polling interfaces for Tiny SRCU grace periods 2021-09-03 10:09:30 +02:00
srcutree.c srcu: Provide polling interfaces for Tree SRCU grace periods 2021-09-03 10:09:29 +02:00
sync.c
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tasks.h rcu-tasks: Move RTGS_WAIT_CBS to beginning of rcu_tasks_kthread() loop 2021-11-18 14:03:53 +01:00
tiny.c
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tree.c rcu: Add lockdep_assert_irqs_disabled() to rcu_sched_clock_irq() and callees 2021-09-15 09:50:28 +02:00
tree.h
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tree_exp.h rcu: Fix existing exp request check in sync_sched_exp_online_cleanup() 2021-11-18 14:04:02 +01:00
tree_plugin.h rcu: Always inline rcu_dynticks_task*_{enter,exit}() 2021-11-18 14:04:06 +01:00
tree_stall.h rcu: Fix stall-warning deadlock due to non-release of rcu_node ->lock 2021-09-15 09:50:28 +02:00
update.c rcu: Reject RCU_LOCKDEP_WARN() false positives 2021-07-20 16:05:38 +02:00