linux/block/bdev.c, branch v5.17

mm: remove cleancache

2022-01-22T06:33:38Z

Patch series "remove Xen tmem leftovers". Since the removal of the Xen tmem driver in 2019, the cleancache hooks are entirely unused, as are large parts of frontswap. This series against linux-next (with the folio changes included) removes cleancaches, and cuts down frontswap to the bits actually used by zswap. This patch (of 13): The cleancache subsystem is unused since the removal of Xen tmem driver in commit 814bbf49dcd0 ("xen: remove tmem driver"). [akpm@linux-foundation.org: remove now-unreachable code] Link: https://lkml.kernel.org/r/20211224062246.1258487-1-hch@lst.de Link: https://lkml.kernel.org/r/20211224062246.1258487-2-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Juergen Gross Acked-by: Geert Uytterhoeven Cc: Konrad Rzeszutek Wilk Cc: Hugh Dickins Cc: Seth Jennings Cc: Dan Streetman Cc: Vitaly Wool Cc: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

bdev: Improve lookup_bdev documentation

2021-12-13T18:29:16Z

Add a Context section and rewrite the rest to be clearer. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: Nikolay Borisov Link: https://lore.kernel.org/r/20211213171113.3097631-1-willy@infradead.org Signed-off-by: Jens Axboe

block: Remove redundant initialization of variable ret

2021-11-29T13:41:29Z

The variable ret is being initialized with a value that is never read, it is being updated later on. The assignment is redundant and can be removed. Signed-off-by: Colin Ian King Link: https://lore.kernel.org/r/20211126230652.1175636-1-colin.i.king@gmail.com Signed-off-by: Jens Axboe

block: remove the GENHD_FL_HIDDEN check in blkdev_get_no_open

2021-11-29T13:38:04Z

Hidden gendisks never hash the block device inode, so this can't happen. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20211122130625.1136848-8-hch@lst.de Signed-off-by: Jens Axboe

block: move GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE to disk->event_flags

2021-11-29T13:35:21Z

GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE is all about the event reporting mechanism, so move it to the event_flags field. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20211122130625.1136848-3-hch@lst.de Signed-off-by: Jens Axboe

block: avoid to touch unloaded module instance when opening bdev

2021-11-23T01:35:37Z

disk->fops->owner is grabbed in blkdev_get_no_open() after the disk kobject refcount is increased. This way can't make sure that disk->fops->owner is still alive since del_gendisk() still can move on if the kobject refcount of disk is grabbed by open() and disk->fops->open() isn't called yet. Fixes the issue by moving try_module_get() into blkdev_get_by_dev() with ->open_mutex() held, then we can drain the in-progress open() in del_gendisk(). Meantime new open() won't succeed because disk becomes not alive. This way is reasonable because blkdev_get_no_open() needn't to touch disk->fops or defined callbacks. Cc: Christoph Hellwig Cc: czhong@redhat.com Signed-off-by: Ming Lei Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20211111020343.316126-1-ming.lei@redhat.com Signed-off-by: Jens Axboe

block: simplify the block device syncing code

2021-10-22T14:36:55Z

Get rid of the indirections and just provide a sync_bdevs helper for the generic sync code. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20211019062530.2174626-8-hch@lst.de Signed-off-by: Jens Axboe

block: remove __sync_blockdev

2021-10-22T14:36:55Z

Instead offer a new sync_blockdev_nowait helper for the !wait case. This new helper is exported as it will grow modular callers in a bit. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20211019062530.2174626-3-hch@lst.de Signed-off-by: Jens Axboe

fs: bdev: fix conflicting comment from lookup_bdev

2021-10-21T14:24:14Z

We switched to directly use dev_t to get block device, lookup changed the meaning of use, now we fix this conflicting comment. Fixes: 4e7b5671c6a8 ("block: remove i_bdev") Cc: Jens Axboe Cc: Christoph Hellwig Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Jackie Liu Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20211021071344.1600362-1-liu.yun@linux.dev Signed-off-by: Jens Axboe

block: use bdev_get_queue() in bdev.c

2021-10-18T12:17:36Z

Convert bdev->bd_disk->queue to bdev_get_queue(), it's uses a cached queue pointer and so is faster. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/a352936ce5d9ac719645b1e29b173d931ebcdc02.1634219547.git.asml.silence@gmail.com Signed-off-by: Jens Axboe