add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/md/md-multipath.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * multipath.c : Multiple Devices driver for Linux
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  *
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@@ -8,15 +9,6 @@
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  * MULTIPATH management functions.
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  *
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  * derived from raid1.c.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2, or (at your option)
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- * any later version.
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- *
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- * You should have received a copy of the GNU General Public License
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- * (for example /usr/src/linux/COPYING); if not, write to the Free
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- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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  */
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 #include <linux/blkdev.h>
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@@ -139,7 +131,7 @@
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 	mp_bh->bio.bi_private = mp_bh;
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 	mddev_check_writesame(mddev, &mp_bh->bio);
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 	mddev_check_write_zeroes(mddev, &mp_bh->bio);
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-	generic_make_request(&mp_bh->bio);
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+	submit_bio_noacct(&mp_bh->bio);
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 	return true;
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 }
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@@ -157,28 +149,6 @@
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 	}
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 	rcu_read_unlock();
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 	seq_putc(seq, ']');
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-}
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-
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-static int multipath_congested(struct mddev *mddev, int bits)
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-{
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-	struct mpconf *conf = mddev->private;
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-	int i, ret = 0;
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-
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-	rcu_read_lock();
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-	for (i = 0; i < mddev->raid_disks ; i++) {
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-		struct md_rdev *rdev = rcu_dereference(conf->multipaths[i].rdev);
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-		if (rdev && !test_bit(Faulty, &rdev->flags)) {
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-			struct request_queue *q = bdev_get_queue(rdev->bdev);
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-
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-			ret |= bdi_congested(q->backing_dev_info, bits);
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-			/* Just like multipath_map, we just check the
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-			 * first available device
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-			 */
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-			break;
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-		}
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-	}
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-	rcu_read_unlock();
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-	return ret;
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 }
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 /*
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@@ -356,7 +326,7 @@
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 			bio->bi_opf |= REQ_FAILFAST_TRANSPORT;
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 			bio->bi_end_io = multipath_end_request;
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 			bio->bi_private = mp_bh;
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-			generic_make_request(bio);
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+			submit_bio_noacct(bio);
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 		}
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 	}
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 	spin_unlock_irqrestore(&conf->device_lock, flags);
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@@ -486,7 +456,6 @@
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 	.hot_add_disk	= multipath_add_disk,
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 	.hot_remove_disk= multipath_remove_disk,
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 	.size		= multipath_size,
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-	.congested	= multipath_congested,
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 };
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 static int __init multipath_init (void)