Subject: Re: [PATCH 31/34] nfs: convert put_page() to put_user_page*()

From: John Hubbard <[email-masked]>
Date: Fri, 2 Aug 2019 18:41:38 -0700

On 8/2/19 6:27 PM, Calum Mackay wrote:
> On 02/08/2019 3:20 am, [email-masked] wrote:
... 
> Since it's static, and only called twice, might it be better to change its two callers [nfs_direct_{read,write}_schedule_iovec()] to call put_user_pages() directly, and remove nfs_direct_release_pages() entirely?
> 
> thanks,
> calum.
> 
> 
>>     void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
>>
 
Hi Calum,

Absolutely! Is it OK to add your reviewed-by, with the following incremental
patch made to this one?

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index b00b89dda3c5..c0c1b9f2c069 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -276,11 +276,6 @@ ssize_t nfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
        return nfs_file_direct_write(iocb, iter);
 }
 
-static void nfs_direct_release_pages(struct page **pages, unsigned int npages)
-{
-       put_user_pages(pages, npages);
-}
-
 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
                              struct nfs_direct_req *dreq)
 {
@@ -510,7 +505,7 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
                        pos += req_len;
                        dreq->bytes_left -= req_len;
                }
-               nfs_direct_release_pages(pagevec, npages);
+               put_user_pages(pagevec, npages);
                kvfree(pagevec);
                if (result < 0)
                        break;
@@ -933,7 +928,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
                        pos += req_len;
                        dreq->bytes_left -= req_len;
                }
-               nfs_direct_release_pages(pagevec, npages);
+               put_user_pages(pagevec, npages);
                kvfree(pagevec);
                if (result < 0)
                        break;

thanks,
-- 
John Hubbard
NVIDIA

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