o Merge with Linux 2.1.116.

 o New Newport console code.
 o New G364 console code.

1 files changed, 49 insertions, 0 deletions

diff --git a/include/asm-sparc64/smplock.h b/include/asm-sparc64/smplock.h
new file mode 100644
index 000000000..e62326a10
--- /dev/null
+++ b/include/asm-sparc64/smplock.h
@@ -0,0 +1,49 @@
+/*
+ * <asm/smplock.h>
+ *
+ * Default SMP lock implementation
+ */
+#include <linux/interrupt.h>
+#include <asm/spinlock.h>
+
+extern spinlock_t kernel_flag;
+
+/*
+ * Release global kernel lock and global interrupt lock
+ */
+#define release_kernel_lock(task, cpu) \
+do { \
+	if (task->lock_depth >= 0) \
+		spin_unlock(&kernel_flag); \
+	release_irqlock(cpu); \
+	__sti(); \
+} while (0)
+
+/*
+ * Re-acquire the kernel lock
+ */
+#define reacquire_kernel_lock(task) \
+do { \
+	if (task->lock_depth >= 0) \
+		spin_lock(&kernel_flag); \
+} while (0)
+
+
+/*
+ * Getting the big kernel lock.
+ *
+ * This cannot happen asynchronously,
+ * so we only need to worry about other
+ * CPU's.
+ */
+extern __inline__ void lock_kernel(void)
+{
+	if (!++current->lock_depth)
+		spin_lock(&kernel_flag);
+}
+
+extern __inline__ void unlock_kernel(void)
+{
+	if (--current->lock_depth < 0)
+		spin_unlock(&kernel_flag);
+}