Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

[karo-tx-linux.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index 02da9f1fd9df16ee1e6c6bdcf5cbc8c2e05c52d5..c24b6f767bf0f2a4d8a873388a5fbd59ba01c562 100644 (file)
--- 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