Commit 'tty: xuartps: Implement BREAK detection, add SYSRQ support'
(0c0c47bc40a2e358d593b2d7fb93b50027fbfc0c) introduced sysrq support
without properly guarding sysrq specific code which results in build
errors when sysrq is disabled:
        DNAME=KBUILD_STR(xilinx_uartps)" -c -o
        drivers/tty/serial/.tmp_xilinx_uartps.o
        drivers/tty/serial/xilinx_uartps.c
        drivers/tty/serial/xilinx_uartps.c: In function 'xuartps_isr':
        drivers/tty/serial/xilinx_uartps.c:247:5: error: 'struct uart_port'
        has no member named 'sysrq'
        drivers/tty/serial/xilinx_uartps.c:247:5: error: 'struct uart_port'
        has no member named 'sysrq'
        drivers/tty/serial/xilinx_uartps.c:247:5: error: 'struct uart_port'
        has no member named 'sysrq'
        make[3]: *** [drivers/tty/serial/xilinx_uartps.o] Error 1

Reported-by: Masanari Iida <[email protected]>
Cc: Vlad Lungu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Soren Brinkmann <[email protected]>
---
 drivers/tty/serial/xilinx_uartps.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/xilinx_uartps.c 
b/drivers/tty/serial/xilinx_uartps.c
index e46e9f3f19b9..f619ad5b5eae 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -240,6 +240,7 @@ static irqreturn_t xuartps_isr(int irq, void *dev_id)
                                        continue;
                        }
 
+#ifdef SUPPORT_SYSRQ
                        /*
                         * uart_handle_sysrq_char() doesn't work if
                         * spinlocked, for some reason
@@ -253,6 +254,7 @@ static irqreturn_t xuartps_isr(int irq, void *dev_id)
                                }
                                spin_lock(&port->lock);
                        }
+#endif
 
                        port->icount.rx++;
 
-- 
1.8.4.4

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