1 files changed, 25 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/spinlock_types.h b/arch/parisc/include/asm/spinlock_types.h
new file mode 100644
index 000000000..35c5086b7
--- /dev/null
+++ b/arch/parisc/include/asm/spinlock_types.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SPINLOCK_TYPES_H
+#define __ASM_SPINLOCK_TYPES_H
+
+typedef struct {
+	volatile unsigned int lock[4];
+# define __ARCH_SPIN_LOCK_UNLOCKED	{ { 1, 1, 1, 1 } }
+} arch_spinlock_t;
+
+
+/* counter:
+ * Unlocked     : 0x0100_0000
+ * Read lock(s) : 0x00FF_FFFF to 0x01  (Multiple Readers decrement it)
+ * Write lock   : 0x0, but only if prior value is "unlocked" 0x0100_0000
+ */
+typedef struct {
+	arch_spinlock_t		lock_mutex;
+	volatile unsigned int	counter;
+} arch_rwlock_t;
+
+#define __ARCH_RW_LOCK_UNLOCKED__       0x01000000
+#define __ARCH_RW_LOCK_UNLOCKED         { .lock_mutex = __ARCH_SPIN_LOCK_UNLOCKED, \
+					.counter = __ARCH_RW_LOCK_UNLOCKED__ }
+
+#endif