diff --git a/libc/kernel/arch-sh/asm/spinlock.h b/libc/kernel/arch-sh/asm/spinlock.h
new file mode 100644
index 0000000..2eeb198
--- /dev/null
+++ b/libc/kernel/arch-sh/asm/spinlock.h
@@ -0,0 +1,24 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef __ASM_SH_SPINLOCK_H
+#define __ASM_SH_SPINLOCK_H
+
+#define __raw_spin_is_locked(x) ((x)->lock <= 0)
+#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
+#define __raw_spin_unlock_wait(x)   do { cpu_relax(); } while ((x)->lock)
+
+#define __raw_read_can_lock(x) ((x)->lock > 0)
+#define __raw_write_can_lock(x) ((x)->lock == RW_LOCK_BIAS)
+#define _raw_spin_relax(lock) cpu_relax()
+#define _raw_read_relax(lock) cpu_relax()
+#define _raw_write_relax(lock) cpu_relax()
+#endif