[PATCH v2 2/3] lib/list_batch, x86: Enable list insertion/deletion batching for x86

[Waiman Long <Waiman.Long@hpe.com>]

System with a large number of CPUs will benefit from the list batching
facility when the list lock is contended. If the lock isn't contended,
the performance of the list batching function should be similar to the
"lock; listop; unlock;" sequence that it replaces.

This patch enables it for the x86 architecture.

Signed-off-by: Waiman Long <Waiman.Long@hpe.com>
---
 arch/x86/Kconfig |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 330e738..5b35be7 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -42,6 +42,7 @@ config X86
 	select ARCH_SUPPORTS_NUMA_BALANCING	if X86_64
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_CMPXCHG_LOCKREF		if X86_64
+	select ARCH_USE_LIST_BATCHING
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH if SMP
-- 
1.7.1