[PATCH 1/7] mpage: stop using bdev_{read,write}_page

[Christoph Hellwig]

These are micro-optimizations for synchronous I/O, which do not matter
compared to all the other inefficiencies in the legacy buffer_head
based mpage code.

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 fs/mpage.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/fs/mpage.c b/fs/mpage.c
index 0f8ae954a57903..124550cfac4a70 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -269,11 +269,6 @@ static struct bio *do_mpage_readpage(struct 
mpage_readpage_args *args)
 
 alloc_new:
        if (args->bio == NULL) {
-               if (first_hole == blocks_per_page) {
-                       if (!bdev_read_page(bdev, blocks[0] << (blkbits - 9),
-                                                               &folio->page))
-                               goto out;
-               }
                args->bio = bio_alloc(bdev, bio_max_segs(args->nr_pages), opf,
                                      gfp);
                if (args->bio == NULL)
@@ -579,11 +574,6 @@ static int __mpage_writepage(struct page *page, struct 
writeback_control *wbc,
 
 alloc_new:
        if (bio == NULL) {
-               if (first_unmapped == blocks_per_page) {
-                       if (!bdev_write_page(bdev, blocks[0] << (blkbits - 9),
-                                                               page, wbc))
-                               goto out;
-               }
                bio = bio_alloc(bdev, BIO_MAX_VECS,
                                REQ_OP_WRITE | wbc_to_write_flags(wbc),
                                GFP_NOFS);
-- 
2.39.0