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authorChristoph Hellwig <hch@lst.de>2020-11-09 19:52:02 +0300
committerJens Axboe <axboe@kernel.dk>2020-12-02 00:53:39 +0300
commit612c6aa7817f1c89b6a92fc724331aa7c9d77f6e (patch)
tree7a48c0f8c7a7e5533e6bba99884280cc413a341b /fs/block_dev.c
parentefdc41c8d49fc1ff9bbef8f68f1cf1d8d59164a1 (diff)
downloadlinux-612c6aa7817f1c89b6a92fc724331aa7c9d77f6e.tar.xz
block: change the hash used for looking up block devices
Adding the minor to the major creates tons of pointless conflicts. Just use the dev_t itself, which is 32-bits and thus is guaranteed to fit into ino_t. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c26
1 files changed, 2 insertions, 24 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index c5755150c6be..d707ab376da8 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -863,35 +863,12 @@ void __init bdev_cache_init(void)
blockdev_superblock = bd_mnt->mnt_sb; /* For writeback */
}
-/*
- * Most likely _very_ bad one - but then it's hardly critical for small
- * /dev and can be fixed when somebody will need really large one.
- * Keep in mind that it will be fed through icache hash function too.
- */
-static inline unsigned long hash(dev_t dev)
-{
- return MAJOR(dev)+MINOR(dev);
-}
-
-static int bdev_test(struct inode *inode, void *data)
-{
- return BDEV_I(inode)->bdev.bd_dev == *(dev_t *)data;
-}
-
-static int bdev_set(struct inode *inode, void *data)
-{
- BDEV_I(inode)->bdev.bd_dev = *(dev_t *)data;
- return 0;
-}
-
static struct block_device *bdget(dev_t dev)
{
struct block_device *bdev;
struct inode *inode;
- inode = iget5_locked(blockdev_superblock, hash(dev),
- bdev_test, bdev_set, &dev);
-
+ inode = iget_locked(blockdev_superblock, dev);
if (!inode)
return NULL;
@@ -903,6 +880,7 @@ static struct block_device *bdget(dev_t dev)
bdev->bd_super = NULL;
bdev->bd_inode = inode;
bdev->bd_part_count = 0;
+ bdev->bd_dev = dev;
inode->i_mode = S_IFBLK;
inode->i_rdev = dev;
inode->i_bdev = bdev;