net: convert sunrpc from pagevec to folio_batch

Remove the last usage of pagevecs.  There is a slight change here; we now
free the folio_batch as soon as it fills up instead of freeing the
folio_batch when we try to add a page to a full batch.  This should have
no effect in practice.

Link: https://lkml.kernel.org/r/20230621164557.3510324-10-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 762d723..a3a64fb 100644 (file)
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -223,7 +223,7 @@ struct svc_rqst {
        struct page *           *rq_next_page; /* next reply page to use */
        struct page *           *rq_page_end;  /* one past the last page */
 
-       struct pagevec          rq_pvec;
+       struct folio_batch      rq_fbatch;
        struct kvec             rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */
        struct bio_vec          rq_bvec[RPCSVC_MAXPAGES];
 

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 79967b6..8b9011b 100644 (file)
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -649,7 +649,7 @@ svc_rqst_alloc(struct svc_serv *serv, struct svc_pool *pool, int node)
        if (!rqstp)
                return rqstp;
 
-       pagevec_init(&rqstp->rq_pvec);
+       folio_batch_init(&rqstp->rq_fbatch);
 
        __set_bit(RQ_BUSY, &rqstp->rq_flags);
        rqstp->rq_server = serv;
@@ -860,9 +860,9 @@ bool svc_rqst_replace_page(struct svc_rqst *rqstp, struct page *page)
        }
 
        if (*rqstp->rq_next_page) {
-               if (!pagevec_space(&rqstp->rq_pvec))
-                       __pagevec_release(&rqstp->rq_pvec);
-               pagevec_add(&rqstp->rq_pvec, *rqstp->rq_next_page);
+               if (!folio_batch_add(&rqstp->rq_fbatch,
+                               page_folio(*rqstp->rq_next_page)))
+                       __folio_batch_release(&rqstp->rq_fbatch);
        }
 
        get_page(page);
@@ -896,7 +896,7 @@ void svc_rqst_release_pages(struct svc_rqst *rqstp)
 void
 svc_rqst_free(struct svc_rqst *rqstp)
 {
-       pagevec_release(&rqstp->rq_pvec);
+       folio_batch_release(&rqstp->rq_fbatch);
        svc_release_buffer(rqstp);
        if (rqstp->rq_scratch_page)
                put_page(rqstp->rq_scratch_page);