Merge remote-tracking branches 'asoc/fix/mtk', 'asoc/fix/psc', 'asoc/fix/pxa', 'asoc...

[cascardo/linux.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index 02da9f1..c24b6f7 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