[PATCH] sched/wait: Remove unused bit_wait_io_timeout

[linux]

From: "Dr. David Alan Gilbert" <linux@xxxxxxxxxxx>

bit_wait_io_timeout has been unused since 2016's
commit 62906027091f ("mm: add PageWaiters indicating tasks are waiting for a page bit")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@xxxxxxxxxxx>
---
 include/linux/wait_bit.h |  1 -
 kernel/sched/wait_bit.c  | 14 --------------
 2 files changed, 15 deletions(-)

diff --git a/include/linux/wait_bit.h b/include/linux/wait_bit.h
index 7725b7579b78..d9c23377dc75 100644
--- a/include/linux/wait_bit.h
+++ b/include/linux/wait_bit.h
@@ -49,7 +49,6 @@ int wake_bit_function(struct wait_queue_entry *wq_entry, unsigned mode, int sync
 extern int bit_wait(struct wait_bit_key *key, int mode);
 extern int bit_wait_io(struct wait_bit_key *key, int mode);
 extern int bit_wait_timeout(struct wait_bit_key *key, int mode);
-extern int bit_wait_io_timeout(struct wait_bit_key *key, int mode);
 
 /**
  * wait_on_bit - wait for a bit to be cleared
diff --git a/kernel/sched/wait_bit.c b/kernel/sched/wait_bit.c
index 134d7112ef71..c6aab3db70bf 100644
--- a/kernel/sched/wait_bit.c
+++ b/kernel/sched/wait_bit.c
@@ -228,20 +228,6 @@ __sched int bit_wait_timeout(struct wait_bit_key *word, int mode)
 }
 EXPORT_SYMBOL_GPL(bit_wait_timeout);
 
-__sched int bit_wait_io_timeout(struct wait_bit_key *word, int mode)
-{
-	unsigned long now = READ_ONCE(jiffies);
-
-	if (time_after_eq(now, word->timeout))
-		return -EAGAIN;
-	io_schedule_timeout(word->timeout - now);
-	if (signal_pending_state(mode, current))
-		return -EINTR;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(bit_wait_io_timeout);
-
 void __init wait_bit_init(void)
 {
 	int i;
-- 
2.46.2