netdev - [PATCH 1/2] SUNRPC: Set rq_page

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Message-ID: <161651219896.3977.8207251440172510810.stgit@klimt.1015granger.net>
Date:   Tue, 23 Mar 2021 11:09:59 -0400
From:   Chuck Lever <chuck.lever@...cle.com>
To:     mgorman@...hsingularity.net
Cc:     brouer@...hat.com, vbabka@...e.cz, akpm@...ux-foundation.org,
        hch@...radead.org, alexander.duyck@...il.com, willy@...radead.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-mm@...ck.org, linux-nfs@...r.kernel.org
Subject: [PATCH 1/2] SUNRPC: Set rq_page_end differently

Refactor:

I'm about to use the loop variable @i for something else.

As far as the "i++" is concerned, that is a post-increment. The
value of @i is not used subsequently, so the increment operator
is unnecessary and can be removed.

Also note that nfsd_read_actor() was renamed nfsd_splice_actor()
by commit cf8208d0eabd ("sendfile: convert nfsd to
splice_direct_to_actor()").

Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
---
 net/sunrpc/svc_xprt.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 3cdd71a8df1e..609bda97d4ae 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -642,7 +642,7 @@ static void svc_check_conn_limits(struct svc_serv *serv)
 static int svc_alloc_arg(struct svc_rqst *rqstp)
 {
 	struct svc_serv *serv = rqstp->rq_server;
-	struct xdr_buf *arg;
+	struct xdr_buf *arg = &rqstp->rq_arg;
 	int pages;
 	int i;
 
@@ -667,11 +667,10 @@ static int svc_alloc_arg(struct svc_rqst *rqstp)
 			}
 			rqstp->rq_pages[i] = p;
 		}
-	rqstp->rq_page_end = &rqstp->rq_pages[i];
-	rqstp->rq_pages[i++] = NULL; /* this might be seen in nfs_read_actor */
+	rqstp->rq_page_end = &rqstp->rq_pages[pages];
+	rqstp->rq_pages[pages] = NULL; /* this might be seen in nfsd_splice_actor() */
 
 	/* Make arg->head point to first page and arg->pages point to rest */
-	arg = &rqstp->rq_arg;
 	arg->head[0].iov_base = page_address(rqstp->rq_pages[0]);
 	arg->head[0].iov_len = PAGE_SIZE;
 	arg->pages = rqstp->rq_pages + 1;