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-rw-r--r--init/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 02da9f1fd9df..c24b6f767bf0 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1602,6 +1602,18 @@ config PCI_QUIRKS
bugs/quirks. Disable this only if your target machine is
unaffected by PCI quirks.
+config MEMBARRIER
+ bool "Enable membarrier() system call" if EXPERT
+ default y
+ help
+ Enable the membarrier() system call that allows issuing memory
+ barriers across all running threads, which can be used to distribute
+ the cost of user-space memory barriers asymmetrically by transforming
+ pairs of memory barriers into pairs consisting of membarrier() and a
+ compiler barrier.
+
+ If unsure, say Y.
+
config EMBEDDED
bool "Embedded system"
option allnoconfig_y