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rcu: Fix rcu_dynticks_curr_cpu_in_eqs() vs noinstr

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[ Upstream commit 74aece72f9 ]

  vmlinux.o: warning: objtool: rcu_nmi_enter()+0x36: call to __kasan_check_read() leaves .noinstr.text section

noinstr cannot have atomic_*() functions in because they're explicitly
annotated, use arch_atomic_*().

Fixes: 2be57f7328 ("rcu: Weaken ->dynticks accesses and updates")
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>
This commit is contained in:
Peter Zijlstra
2021-09-28 10:40:22 +02:00
committed by Greg Kroah-Hartman
parent fa1af3cb0e
commit d846b69dc7
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/tree.c
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@@ -327,7 +327,7 @@ static void rcu_dynticks_eqs_online(void)
*/
static __always_inline bool rcu_dynticks_curr_cpu_in_eqs(void)
{
return !(atomic_read(this_cpu_ptr(&rcu_data.dynticks)) & 0x1);
return !(arch_atomic_read(this_cpu_ptr(&rcu_data.dynticks)) & 0x1);
}
/*