diff --git a/sys/compat/linuxkpi/common/include/linux/sysfs.h b/sys/compat/linuxkpi/common/include/linux/sysfs.h
--- a/sys/compat/linuxkpi/common/include/linux/sysfs.h
+++ b/sys/compat/linuxkpi/common/include/linux/sysfs.h
@@ -464,6 +464,24 @@
 	return (i);
 }
 
+static inline int
+_sysfs_match_string(const char * const *a, size_t l, const char *s)
+{
+	const char *p;
+	int i;
+
+	for (i = 0; i < l; i++) {
+		p = a[i];
+		if (p == NULL)
+			break;
+		if (sysfs_streq(p, s))
+			return (i);
+	}
+
+	return (-ENOENT);
+}
+#define	sysfs_match_string(a, s)	_sysfs_match_string(a, ARRAY_SIZE(a), s)
+
 #define sysfs_attr_init(attr) do {} while(0)
 
 #endif	/* _LINUXKPI_LINUX_SYSFS_H_ */