zram: fix synchronous reads
Currently nothing waits for the synchronous reads before accessing the data. Switch them to an on-stack bio and submit_bio_wait to make sure the I/O has actually completed when the work item has been flushed. This also removes the call to page_endio that would unlock a page that has never been locked. Drop the partial_io/sync flag, as chaining only makes sense for the asynchronous reads of the entire page. Link: https://lkml.kernel.org/r/20230411171459.567614-17-hch@lst.deSigned-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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