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4e2866b2ba
svc_rqst_replace_page() releases displaced pages through a per-rqst folio batch, but exposes the add-or-flush sequence directly. svc_tcp_restore_pages() releases displaced pages individually with put_page(). Introduce svc_rqst_page_release() to encapsulate the batched release mechanism. Convert svc_rqst_replace_page() and svc_tcp_restore_pages() to use it. The latter now benefits from the same batched release that svc_rqst_replace_page() already uses. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>