swap: fix swapfile read/write offset
commit caf6912f upstream. We're not factoring in the start of the file for where to write and read the swapfile, which leads to very unfortunate side effects of writing where we should not be... Fixes: dd6bd0d9 ("swap: use bdev_read_page() / bdev_write_page()") Signed-off-by: Jens Axboe <axboe@kernel.dk> Cc: Anthony Iliopoulos <ailiop@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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bebf5e83
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