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Commit b086c5bd authored by Qu Wenruo's avatar Qu Wenruo Committed by David Sterba
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btrfs: subpage: make writer lock utilize bitmap 



For the writer counter, it's pretty much the same as the reader counter,
and they are exclusive.  So move them to the new locked bitmap.

Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 8e7e9c67
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