From: Christoph Hellwig <hch@lst.de>
Date: Mon, 16 Aug 2021 14:26:13 +0200
Subject: [PATCH] block: free the extended dev_t minor later
Git-commit: 9451aa0aacaf7ea13d1acfd5de8b63a6e0b24fac
Patch-mainline: v5.15-rc1
References: jsc#PED-1183
The dev_t is used as the inode hash, so we should only released it
once then block device inode is gone from the inode cache. Move it
to bdev_free_inode to ensure that.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210816122614.601358-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/genhd.c | 2 --
block/partitions/core.c | 2 --
fs/block_dev.c | 5 +++++
3 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/block/genhd.c b/block/genhd.c
index 9d6b3aeea288..ed58ddf6258b 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1085,8 +1085,6 @@ static void disk_release(struct device *dev)
might_sleep();
bdi_put(disk->bdi);
- if (MAJOR(dev->devt) == BLOCK_EXT_MAJOR)
- blk_free_ext_minor(MINOR(dev->devt));
disk_release_events(disk);
kfree(disk->random);
xa_destroy(&disk->part_tbl);
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 9265936df77e..58c4c362c94f 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -259,8 +259,6 @@ static const struct attribute_group *part_attr_groups[] = {
static void part_release(struct device *dev)
{
- if (MAJOR(dev->devt) == BLOCK_EXT_MAJOR)
- blk_free_ext_minor(MINOR(dev->devt));
put_disk(dev_to_bdev(dev)->bd_disk);
iput(dev_to_bdev(dev)->bd_inode);
}
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 38a8b0e04a0c..4bd2a632c79c 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -35,6 +35,7 @@
#include <linux/uaccess.h>
#include <linux/suspend.h>
#include "internal.h"
+#include "../block/blk.h"
struct bdev_inode {
struct block_device bdev;
@@ -813,6 +814,10 @@ static void bdev_free_inode(struct inode *inode)
if (!bdev_is_partition(bdev))
kfree(bdev->bd_disk);
+
+ if (MAJOR(bdev->bd_dev) == BLOCK_EXT_MAJOR)
+ blk_free_ext_minor(MINOR(bdev->bd_dev));
+
kmem_cache_free(bdev_cachep, BDEV_I(inode));
}
--
2.35.3