diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 33a9351..5afe731 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -346,6 +346,19 @@
 	.enable_mask	= SYSRQ_ENABLE_SIGNAL,
 };
 
+#ifdef CONFIG_BLOCK
+static void sysrq_handle_thaw(int key, struct tty_struct *tty)
+{
+	emergency_thaw_all();
+}
+static struct sysrq_key_op sysrq_thaw_op = {
+	.handler	= sysrq_handle_thaw,
+	.help_msg	= "thaw-filesystems(J)",
+	.action_msg	= "Emergency Thaw of all frozen filesystems",
+	.enable_mask	= SYSRQ_ENABLE_SIGNAL,
+};
+#endif
+
 static void sysrq_handle_kill(int key, struct tty_struct *tty)
 {
 	send_sig_all(SIGKILL);
@@ -396,9 +409,13 @@
 	&sysrq_moom_op,			/* f */
 	/* g: May be registered by ppc for kgdb */
 	NULL,				/* g */
-	NULL,				/* h */
+	NULL,				/* h - reserved for help */
 	&sysrq_kill_op,			/* i */
+#ifdef CONFIG_BLOCK
+	&sysrq_thaw_op,			/* j */
+#else
 	NULL,				/* j */
+#endif
 	&sysrq_SAK_op,			/* k */
 #ifdef CONFIG_SMP
 	&sysrq_showallcpus_op,		/* l */