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authorIngo Molnar <mingo@kernel.org>2018-05-30 07:55:39 +0200
committerIngo Molnar <mingo@kernel.org>2018-05-30 07:55:39 +0200
commit52f2b34f46223ca2789320fa10c13f6664c1b628 (patch)
tree28c597a8d38898c7807a19a4ec128777e3b90964 /arch/x86/kernel
parent13a553199fa9327f957ba5e8462705ed250a9e6a (diff)
parentf64c6013a2029316ea552f99823d116ee5f5f955 (diff)
Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU fix from Paul E. McKenney: "This additional v4.18 pull request contains a single commit that fell through the cracks: Provide early rcu_cpu_starting() callback for the benefit of the x86/mtrr code, which needs RCU to be available on incoming CPUs earlier than has been the case in the past." Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/cpu/mtrr/main.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 7468de429087..3ea0047beb40 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -46,6 +46,7 @@
#include <linux/pci.h>
#include <linux/smp.h>
#include <linux/syscore_ops.h>
+#include <linux/rcupdate.h>
#include <asm/cpufeature.h>
#include <asm/e820/api.h>
@@ -793,6 +794,9 @@ void mtrr_ap_init(void)
if (!use_intel() || mtrr_aps_delayed_init)
return;
+
+ rcu_cpu_starting(smp_processor_id());
+
/*
* Ideally we should hold mtrr_mutex here to avoid mtrr entries
* changed, but this routine will be called in cpu boot time,