add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/drivers/s390/block/dasd_genhd.c
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@@ -76,7 +76,7 @@
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 	gdp->queue = block->request_queue;
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 	block->gdp = gdp;
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 	set_capacity(block->gdp, 0);
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-	device_add_disk(&base->cdev->dev, block->gdp);
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+	device_add_disk(&base->cdev->dev, block->gdp, NULL);
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 	return 0;
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 }
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82
 
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@@ -101,22 +101,17 @@
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 	struct block_device *bdev;
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 	int rc;
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-	bdev = bdget_disk(block->gdp, 0);
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-	if (!bdev) {
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-		DBF_DEV_EVENT(DBF_ERR, block->base, "%s",
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-			      "scan partitions error, bdget returned NULL");
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-		return -ENODEV;
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-	}
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-
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-	rc = blkdev_get(bdev, FMODE_READ, NULL);
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-	if (rc < 0) {
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+	bdev = blkdev_get_by_dev(disk_devt(block->gdp), FMODE_READ, NULL);
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+	if (IS_ERR(bdev)) {
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 		DBF_DEV_EVENT(DBF_ERR, block->base,
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-			      "scan partitions error, blkdev_get returned %d",
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-			      rc);
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+			      "scan partitions error, blkdev_get returned %ld",
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+			      PTR_ERR(bdev));
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 		return -ENODEV;
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 	}
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-	rc = blkdev_reread_part(bdev);
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+	mutex_lock(&bdev->bd_mutex);
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+	rc = bdev_disk_changed(bdev, false);
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+	mutex_unlock(&bdev->bd_mutex);
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 	if (rc)
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 		DBF_DEV_EVENT(DBF_ERR, block->base,
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 				"scan partitions error, rc %d", rc);
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@@ -141,9 +136,6 @@
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  */
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 void dasd_destroy_partitions(struct dasd_block *block)
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 {
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-	/* The two structs have 168/176 byte on 31/64 bit. */
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-	struct blkpg_partition bpart;
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-	struct blkpg_ioctl_arg barg;
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 	struct block_device *bdev;
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140
 
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 	/*
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@@ -153,19 +145,10 @@
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 	bdev = block->bdev;
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 	block->bdev = NULL;
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147
 
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-	/*
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-	 * See fs/partition/check.c:delete_partition
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-	 * Can't call delete_partitions directly. Use ioctl.
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-	 * The ioctl also does locking and invalidation.
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-	 */
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-	memset(&bpart, 0, sizeof(struct blkpg_partition));
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-	memset(&barg, 0, sizeof(struct blkpg_ioctl_arg));
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-	barg.data = (void __force __user *) &bpart;
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-	barg.op = BLKPG_DEL_PARTITION;
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-	for (bpart.pno = block->gdp->minors - 1; bpart.pno > 0; bpart.pno--)
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-		ioctl_by_bdev(bdev, BLKPG, (unsigned long) &barg);
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+	mutex_lock(&bdev->bd_mutex);
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+	blk_drop_partitions(bdev);
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+	mutex_unlock(&bdev->bd_mutex);
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-	invalidate_partition(block->gdp, 0);
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 	/* Matching blkdev_put to the blkdev_get in dasd_scan_partitions. */
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 	blkdev_put(bdev, FMODE_READ);
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 	set_capacity(block->gdp, 0);