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blkdev: comment fs_holder_ops

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Add a comment to @fs_holder_ops that @holder must point to a superblock.

Link: https://lore.kernel.org/r/20231024-vfs-super-freeze-v2-10-599c19f4faac@kernel.org
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2023-10-24 15:01:16 +02:00
parent 01bc8e9ae2
commit e419cf3eba
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1 changed files with 5 additions and 0 deletions
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5
include/linux/blkdev.h
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@ -1480,6 +1480,11 @@ struct blk_holder_ops {
int (*thaw)(struct block_device *bdev);
};
/*
* For filesystems using @fs_holder_ops, the @holder argument passed to
* helpers used to open and claim block devices via
* bd_prepare_to_claim() must point to a superblock.
*/
extern const struct blk_holder_ops fs_holder_ops;
/*