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[ Upstream commit e57903fd972a398b7140d0bc055714e13a0e58c5 ] It seems pblk_dealloc_page would race against pblk_alloc_pages for line bitmap for sector allocation.The chances are very low but might as well protect the bitmap properly. Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Reviewed-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>