[tip: sched/core] sched/wait: Remove unused bit_wait_io_timeout

[tip-bot2 for Dr. David Alan Gilbert]

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     0ac8f14ef22a1592b44dc90272aab35e43b0106a
Gitweb:        https://git.kernel.org/tip/0ac8f14ef22a1592b44dc90272aab35e43b0106a
Author:        Dr. David Alan Gilbert <linux@xxxxxxxxxxx>
AuthorDate:    Wed, 02 Oct 2024 00:40:16 +01:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Mon, 07 Oct 2024 09:28:41 +02:00

sched/wait: Remove unused bit_wait_io_timeout

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>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241001234016.231696-1-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 6346e26..9e29d79 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 22ec270..b410b61 100644
--- a/kernel/sched/wait_bit.c
+++ b/kernel/sched/wait_bit.c
@@ -266,20 +266,6 @@ __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;