init android origin source code

1 files changed, 28 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/arch/x86/kernel/paravirt-spinlocks.c b/ANDROID_3.4.5/arch/x86/kernel/paravirt-spinlocks.c
new file mode 100644
index 00000000..676b8c77
--- /dev/null
+++ b/ANDROID_3.4.5/arch/x86/kernel/paravirt-spinlocks.c
@@ -0,0 +1,28 @@
+/*
+ * Split spinlock implementation out into its own file, so it can be
+ * compiled in a FTRACE-compatible way.
+ */
+#include <linux/spinlock.h>
+#include <linux/module.h>
+
+#include <asm/paravirt.h>
+
+static inline void
+default_spin_lock_flags(arch_spinlock_t *lock, unsigned long flags)
+{
+	arch_spin_lock(lock);
+}
+
+struct pv_lock_ops pv_lock_ops = {
+#ifdef CONFIG_SMP
+	.spin_is_locked = __ticket_spin_is_locked,
+	.spin_is_contended = __ticket_spin_is_contended,
+
+	.spin_lock = __ticket_spin_lock,
+	.spin_lock_flags = default_spin_lock_flags,
+	.spin_trylock = __ticket_spin_trylock,
+	.spin_unlock = __ticket_spin_unlock,
+#endif
+};
+EXPORT_SYMBOL(pv_lock_ops);
+