There are two steps to enable each architecture to do lockless
reference count update:
1. Define the ARCH_SPINLOCK_REFCOUNT config parameter in its Kconfig
file.
2. Add a <asm/spinlock_refcount.h> architecture specific header file.
This is done for the x86 architecture to use the generic version
available.
Signed-off-by: Waiman Long <waiman.l...@hp.com>
---
arch/x86/Kconfig | 3 +++
arch/x86/include/asm/spinlock_refcount.h | 1 +
2 files changed, 4 insertions(+), 0 deletions(-)
create mode 100644 arch/x86/include/asm/spinlock_refcount.h
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index fe120da..649ed4b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -253,6 +253,9 @@ config ARCH_CPU_PROBE_RELEASE
config ARCH_SUPPORTS_UPROBES
def_bool y
+config ARCH_SPINLOCK_REFCOUNT
+ def_bool y
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/x86/include/asm/spinlock_refcount.h
b/arch/x86/include/asm/spinlock_refcount.h
new file mode 100644
index 0000000..ab6224f
--- /dev/null
+++ b/arch/x86/include/asm/spinlock_refcount.h
@@ -0,0 +1 @@
+#include <asm-generic/spinlock_refcount.h>
--
1.7.1
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