mm: Add functions to lock invalidate_lock for two mappings

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Some operations such as reflinking blocks among files will need to lock
invalidate_lock for two mappings. Add helper functions to do that.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

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Jan Kara 2021-05-24 13:02:30 +02:00

parent 730633f0b7

commit 7506ae6a70

2 changed files with 44 additions and 0 deletions

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6

include/linux/fs.h

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38

mm/filemap.c

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