sh4 support

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/arch/arch-sh.h b/arch/arch-sh.h
new file mode 100644
index 0000000..72183fa
--- /dev/null
+++ b/arch/arch-sh.h
@@ -0,0 +1,27 @@
+/* Renesas SH (32bit) only */
+
+#ifndef ARCH_SH_H
+#define ARCH_SH_H
+
+#define SH	(arch_sh)
+
+#ifndef __NR_ioprio_set
+#define __NR_ioprio_set	288
+#define __NR_ioprio_get	289
+#endif
+
+#ifndef __NR_fadvise64
+#define __NR_fadvise64	250
+#endif
+
+#ifndef __NR_sys_splice
+#define __NR_sys_splice		313
+#define __NR_sys_tee		315
+#define __NR_sys_vmsplice	316
+#endif
+
+#define nop             __asm__ __volatile__ ("nop": : :"memory")
+#define read_barrier()  __asm__ __volatile__ (" " : : : "memory")
+#define write_barrier() __asm__ __volatile__ (" " : : : "memory")
+
+#endif
diff --git a/arch/arch.h b/arch/arch.h
index 0ad7b6e..b4f2630 100644
--- a/arch/arch.h
+++ b/arch/arch.h
@@ -17,6 +17,7 @@
 	arch_sparc,
 	arch_sparc64,
 	arch_arm,
+	arch_sh,
 
 	arch_generic,
 };
@@ -41,6 +42,8 @@
 #include "arch-arm.h"
 #elif defined(__mips__) || defined(__mips64__)
 #include "arch-mips.h"
+#elif defined(__sh__)
+#include "arch-sh.h"
 #else
 #warning "Unknown architecture, attempting to use generic model."
 #include "arch-generic.h"