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由 Hugh Dickins 提交于
Remove shmem_file_sendfile and resurrect shmem_readpage, as used by tmpfs to support loop and sendfile in 2.4 and 2.5. Now tmpfs can support splice, loop and sendfile in the simplest way, using generic_file_splice_read and generic_file_splice_write (with the aid of shmem_prepare_write). We could make some efficiency tweaks later, if there's a real need; but this is stable and works well as is. Signed-off-by: NHugh Dickins <hugh@veritas.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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