zloop: advertise a volatile write cache

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[ Upstream commit 6acf7860dc ]

Zloop is file system backed and thus needs to sync the underlying file
system to persist data.  Set BLK_FEAT_WRITE_CACHE so that the block
layer actually send flush commands, and fix the flush implementation
as sync_filesystem requires s_umount to be held and the code currently
misses that.

Fixes: eb0570c7df ("block: new zoned loop block device driver")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Christoph Hellwig 2026-02-24 06:21:44 -08:00 • committed by Sasha Levin

parent 93b64bef8c

commit f6c6a888c8

1 changed files with 18 additions and 6 deletions

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drivers/block/zloop.c

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