From 4054cff92c357813b6861b622122b344990f7e31 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 17 Nov 2021 07:13:56 +0100
Subject: block: remove blk-exec.c

All this code is tightly coupled to the blk-mq core, so move it
there.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20211117061404.331732-4-hch@lst.de
[axboe: remove doc generation for blk-exec.c]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-exec.c | 116 -------------------------------------------------------
 1 file changed, 116 deletions(-)
 delete mode 100644 block/blk-exec.c

(limited to 'block/blk-exec.c')

diff --git a/block/blk-exec.c b/block/blk-exec.c
deleted file mode 100644
index 1b8b47f6e79b..000000000000
--- a/block/blk-exec.c
+++ /dev/null
@@ -1,116 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Functions related to setting various queue properties from drivers
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/bio.h>
-#include <linux/blkdev.h>
-#include <linux/blk-mq.h>
-#include <linux/sched/sysctl.h>
-
-#include "blk.h"
-#include "blk-mq-sched.h"
-
-/**
- * blk_end_sync_rq - executes a completion event on a request
- * @rq: request to complete
- * @error: end I/O status of the request
- */
-static void blk_end_sync_rq(struct request *rq, blk_status_t error)
-{
-	struct completion *waiting = rq->end_io_data;
-
-	rq->end_io_data = (void *)(uintptr_t)error;
-
-	/*
-	 * complete last, if this is a stack request the process (and thus
-	 * the rq pointer) could be invalid right after this complete()
-	 */
-	complete(waiting);
-}
-
-/**
- * blk_execute_rq_nowait - insert a request to I/O scheduler for execution
- * @bd_disk:	matching gendisk
- * @rq:		request to insert
- * @at_head:    insert request at head or tail of queue
- * @done:	I/O completion handler
- *
- * Description:
- *    Insert a fully prepared request at the back of the I/O scheduler queue
- *    for execution.  Don't wait for completion.
- *
- * Note:
- *    This function will invoke @done directly if the queue is dead.
- */
-void blk_execute_rq_nowait(struct gendisk *bd_disk, struct request *rq,
-			   int at_head, rq_end_io_fn *done)
-{
-	WARN_ON(irqs_disabled());
-	WARN_ON(!blk_rq_is_passthrough(rq));
-
-	rq->rq_disk = bd_disk;
-	rq->end_io = done;
-
-	blk_account_io_start(rq);
-
-	/*
-	 * don't check dying flag for MQ because the request won't
-	 * be reused after dying flag is set
-	 */
-	blk_mq_sched_insert_request(rq, at_head, true, false);
-}
-EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
-
-static bool blk_rq_is_poll(struct request *rq)
-{
-	if (!rq->mq_hctx)
-		return false;
-	if (rq->mq_hctx->type != HCTX_TYPE_POLL)
-		return false;
-	if (WARN_ON_ONCE(!rq->bio))
-		return false;
-	return true;
-}
-
-static void blk_rq_poll_completion(struct request *rq, struct completion *wait)
-{
-	do {
-		bio_poll(rq->bio, NULL, 0);
-		cond_resched();
-	} while (!completion_done(wait));
-}
-
-/**
- * blk_execute_rq - insert a request into queue for execution
- * @bd_disk:	matching gendisk
- * @rq:		request to insert
- * @at_head:    insert request at head or tail of queue
- *
- * Description:
- *    Insert a fully prepared request at the back of the I/O scheduler queue
- *    for execution and wait for completion.
- * Return: The blk_status_t result provided to blk_mq_end_request().
- */
-blk_status_t blk_execute_rq(struct gendisk *bd_disk, struct request *rq, int at_head)
-{
-	DECLARE_COMPLETION_ONSTACK(wait);
-	unsigned long hang_check;
-
-	rq->end_io_data = &wait;
-	blk_execute_rq_nowait(bd_disk, rq, at_head, blk_end_sync_rq);
-
-	/* Prevent hang_check timer from firing at us during very long I/O */
-	hang_check = sysctl_hung_task_timeout_secs;
-
-	if (blk_rq_is_poll(rq))
-		blk_rq_poll_completion(rq, &wait);
-	else if (hang_check)
-		while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2)));
-	else
-		wait_for_completion_io(&wait);
-
-	return (blk_status_t)(uintptr_t)rq->end_io_data;
-}
-EXPORT_SYMBOL(blk_execute_rq);
-- 
cgit