When using signal_wake_up() from a loadable kernel module:
ERROR: "signal_wake_up_state" [drivers/spi/spi-sh-msiof.ko] undefined!
Export signal_wake_up_state() to modules to fix this.
Reported-by: kbuild test robot <[email protected]>
Signed-off-by: Geert Uytterhoeven <[email protected]>
---
I'm using signal_wake_up() to abort a task blocked on
wait_for_completion_interruptible(), cfr. sh_msiof_slave_abort() in
"spi: sh-msiof: Add slave mode support"
(http://www.spinics.net/lists/devicetree/msg175575.html).
Is exporting signal_wake_up_state() an acceptable solution?
Alternatively, I can extract the code to abort an completion into a
generic abort_completion() function, and export that.
Or is there a better way to abort a completion?
Thanks!
---
kernel/signal.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/signal.c b/kernel/signal.c
index 7e59ebc2c25e669e..f130598acd34f08b 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -660,6 +660,7 @@ void signal_wake_up_state(struct task_struct *t, unsigned
int state)
if (!wake_up_state(t, state | TASK_INTERRUPTIBLE))
kick_process(t);
}
+EXPORT_SYMBOL_GPL(signal_wake_up_state);
/*
* Remove signals in mask from the pending set and queue.
--
2.7.4
