diff --git a/arch/sh/include/asm/cachectl.h b/arch/sh/include/asm/cachectl.h
index 305dd7082a66..6ffb4b7a212e 100644
--- a/arch/sh/include/asm/cachectl.h
+++ b/arch/sh/include/asm/cachectl.h
@@ -9,4 +9,11 @@
 
 #define CACHEFLUSH_I		0x4
 
+/*
+ * Options for cacheflush system call
+ */
+#define ICACHE	CACHEFLUSH_I		/* flush instruction cache */
+#define DCACHE	CACHEFLUSH_D_PURGE	/* writeback and flush data cache */
+#define BCACHE	(ICACHE|DCACHE)		/* flush both caches */
+
 #endif /* _SH_CACHECTL_H */
diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c
index ec65dd8842b1..8aa5d1ceaf14 100644
--- a/arch/sh/kernel/sys_sh.c
+++ b/arch/sh/kernel/sys_sh.c
@@ -186,7 +186,7 @@ asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
 {
 	struct vm_area_struct *vma;
 
-	if ((op < 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
+	if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
 		return -EINVAL;
 
 	/*