From de84825a22b0c5d7ddb94ea632f992eff6e48133 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Mon, 21 Sep 2020 12:31:36 +0200 Subject: [PATCH] BACKPORT: rcu/tree: Export rcu_idle_{enter,exit} to modules Fix this link error: ERROR: modpost: "rcu_idle_enter" [drivers/acpi/processor.ko] undefined! ERROR: modpost: "rcu_idle_exit" [drivers/acpi/processor.ko] undefined! when CONFIG_ACPI_PROCESSOR is built as module. PeterZ says that in light of ARM needing those soon too, they should simply be exported. Link: https://lore.kernel.org/linux-pm/20200921103741.GC5901@zn.tnic/ Bug: 172034763 Change-Id: I26d516d11edbce673f52df6474f6695c5a1e2b07 (cherry picked from commit 3ad1c8ef083bef96ec922688966484be1039e6b5) Fixes: 1fecfdbb7acc ("ACPI: processor: Take over RCU-idle for C3-BM idle") Reported-by: Sven Joachim Suggested-by: Peter Zijlstra Signed-off-by: Borislav Petkov Reviewed-by: Paul E. McKenney Signed-off-by: Rafael J. Wysocki Signed-off-by: Cheng Jui Wang Signed-off-by: Chun-Hung Wu --- kernel/rcu/tree.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 62e59596a30a..e370d2c19e46 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -603,6 +603,7 @@ void rcu_idle_enter(void) lockdep_assert_irqs_disabled(); rcu_eqs_enter(false); } +EXPORT_SYMBOL_GPL(rcu_idle_enter); #ifdef CONFIG_NO_HZ_FULL /** @@ -768,6 +769,7 @@ void rcu_idle_exit(void) rcu_eqs_exit(false); local_irq_restore(flags); } +EXPORT_SYMBOL_GPL(rcu_idle_exit); #ifdef CONFIG_NO_HZ_FULL /**