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e64aa657c3
The SRP target driver will need to allocate and chain it's own SGLs soon. For this export target_alloc_sgl, and add a new argument to it so that it can allocate an additional chain entry that doesn't point to a page. Also export transport_free_sgl after renaming it to target_free_sgl to free these SGLs again. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>