openwrtv4/target/linux/generic/patches-4.4/890-8250_optional_sysrq.patch

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--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -15,7 +15,7 @@
* membase is an 'ioremapped' cookie.
*/
-#if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#if defined(CONFIG_SERIAL_8250_SYSRQ) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -91,6 +91,10 @@ config SERIAL_8250_CONSOLE
If unsure, say N.
+config SERIAL_8250_SYSRQ
+ bool "Magic sysrq support on 8250/16550 devices"
+ depends on SERIAL_8250_CONSOLE
+
config SERIAL_8250_GSC
tristate
depends on SERIAL_8250 && GSC