[PATCH] sysrq: export sysrq_mask symbol

[Paolo Pisati]

Commit "68af431 serial/sysrq: Add MAGIC_SYSRQ_SERIAL_SEQUENCE" breaks
the build if CONFIG_SERIAL_CORE=m:

...
ERROR: modpost: "sysrq_mask" [drivers/tty/serial/serial_core.ko] undefined!
make[1]: *** [scripts/Makefile.modpost:94: __modpost] Error 1
make: *** [Makefile:1331: modules] Error 2

Signed-off-by: Paolo Pisati <paolo.pisati@xxxxxxxxxxxxx>
---
 drivers/tty/sysrq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 5e0d0813da55..cf49010335fd 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -74,6 +74,7 @@ int sysrq_mask(void)
 		return 1;
 	return sysrq_enabled;
 }
+EXPORT_SYMBOL(sysrq_mask);
 
 /*
  * A value of 1 means 'all', other nonzero values are an op mask:
-- 
2.25.1