The patch titled
Subject: mm/filemap: rename generic_file_buffered_read subfunctions
has been added to the -mm tree. Its filename is
mm-filemap-rename-generic_file_buffered_read-subfunctions.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-filemap-rename-generic_file_buffered_read-subfunctions.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-filemap-rename-generic_file_buffered_read-subfunctions.patch
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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm/filemap: rename generic_file_buffered_read subfunctions
Patch series "Refactor generic_file_buffered_read", v5.
This is a combination of Christoph's work to refactor
generic_file_buffered_read() and some of my large-page support
which was disrupted by Kent's refactoring of generic_file_buffered_read.
This patch (of 18):
The recent split of generic_file_buffered_read() created some very long
function names which are hard to distinguish from each other. Rename as
follows:
generic_file_buffered_read_readpage -> filemap_read_page
generic_file_buffered_read_pagenotuptodate -> filemap_update_page
generic_file_buffered_read_no_cached_page -> filemap_create_page
generic_file_buffered_read_get_pages -> filemap_get_pages
Link: https://lkml.kernel.org/r/20210122160140.223228-2-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/filemap.c | 44 +++++++++++++++-----------------------------
1 file changed, 15 insertions(+), 29 deletions(-)
--- a/mm/filemap.c~mm-filemap-rename-generic_file_buffered_read-subfunctions
+++ a/mm/filemap.c
@@ -2172,11 +2172,8 @@ static int lock_page_for_iocb(struct kio
return lock_page_killable(page);
}
-static struct page *
-generic_file_buffered_read_readpage(struct kiocb *iocb,
- struct file *filp,
- struct address_space *mapping,
- struct page *page)
+static struct page *filemap_read_page(struct kiocb *iocb, struct file *filp,
+ struct address_space *mapping, struct page *page)
{
struct file_ra_state *ra = &filp->f_ra;
int error;
@@ -2227,12 +2224,9 @@ generic_file_buffered_read_readpage(stru
return page;
}
-static struct page *
-generic_file_buffered_read_pagenotuptodate(struct kiocb *iocb,
- struct file *filp,
- struct iov_iter *iter,
- struct page *page,
- loff_t pos, loff_t count)
+static struct page *filemap_update_page(struct kiocb *iocb, struct file *filp,
+ struct iov_iter *iter, struct page *page, loff_t pos,
+ loff_t count)
{
struct address_space *mapping = filp->f_mapping;
struct inode *inode = mapping->host;
@@ -2295,12 +2289,11 @@ page_not_up_to_date_locked:
return page;
}
- return generic_file_buffered_read_readpage(iocb, filp, mapping, page);
+ return filemap_read_page(iocb, filp, mapping, page);
}
-static struct page *
-generic_file_buffered_read_no_cached_page(struct kiocb *iocb,
- struct iov_iter *iter)
+static struct page *filemap_create_page(struct kiocb *iocb,
+ struct iov_iter *iter)
{
struct file *filp = iocb->ki_filp;
struct address_space *mapping = filp->f_mapping;
@@ -2311,10 +2304,6 @@ generic_file_buffered_read_no_cached_pag
if (iocb->ki_flags & IOCB_NOIO)
return ERR_PTR(-EAGAIN);
- /*
- * Ok, it wasn't cached, so we need to create a new
- * page..
- */
page = page_cache_alloc(mapping);
if (!page)
return ERR_PTR(-ENOMEM);
@@ -2326,13 +2315,11 @@ generic_file_buffered_read_no_cached_pag
return error != -EEXIST ? ERR_PTR(error) : NULL;
}
- return generic_file_buffered_read_readpage(iocb, filp, mapping, page);
+ return filemap_read_page(iocb, filp, mapping, page);
}
-static int generic_file_buffered_read_get_pages(struct kiocb *iocb,
- struct iov_iter *iter,
- struct page **pages,
- unsigned int nr)
+static int filemap_get_pages(struct kiocb *iocb, struct iov_iter *iter,
+ struct page **pages, unsigned int nr)
{
struct file *filp = iocb->ki_filp;
struct address_space *mapping = filp->f_mapping;
@@ -2359,7 +2346,7 @@ find_page:
if (nr_got)
goto got_pages;
- pages[0] = generic_file_buffered_read_no_cached_page(iocb, iter);
+ pages[0] = filemap_create_page(iocb, iter);
err = PTR_ERR_OR_ZERO(pages[0]);
if (!IS_ERR_OR_NULL(pages[0]))
nr_got = 1;
@@ -2393,8 +2380,8 @@ got_pages:
break;
}
- page = generic_file_buffered_read_pagenotuptodate(iocb,
- filp, iter, page, pg_pos, pg_count);
+ page = filemap_update_page(iocb, filp, iter, page,
+ pg_pos, pg_count);
if (IS_ERR_OR_NULL(page)) {
for (j = i + 1; j < nr_got; j++)
put_page(pages[j]);
@@ -2473,8 +2460,7 @@ ssize_t generic_file_buffered_read(struc
iocb->ki_flags |= IOCB_NOWAIT;
i = 0;
- pg_nr = generic_file_buffered_read_get_pages(iocb, iter,
- pages, nr_pages);
+ pg_nr = filemap_get_pages(iocb, iter, pages, nr_pages);
if (pg_nr < 0) {
error = pg_nr;
break;
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-debug-improve-memcg-debugging.patch
mm-filemap-rename-generic_file_buffered_read-subfunctions.patch
mm-filemap-remove-dynamically-allocated-array-from-filemap_read.patch
mm-filemap-convert-filemap_get_pages-to-take-a-pagevec.patch
mm-filemap-use-head-pages-in-generic_file_buffered_read.patch
mm-filemap-pass-a-sleep-state-to-put_and_wait_on_page_locked.patch
mm-filemap-support-readpage-splitting-a-page.patch
mm-filemap-inline-__wait_on_page_locked_async-into-caller.patch
mm-filemap-dont-call-readpage-if-iocb_waitq-is-set.patch
mm-filemap-change-filemap_read_page-calling-conventions.patch
mm-filemap-change-filemap_create_page-calling-conventions.patch
mm-filemap-convert-filemap_update_page-to-return-an-errno.patch
mm-filemap-move-the-iocb-checks-into-filemap_update_page.patch
mm-filemap-add-filemap_range_uptodate.patch
mm-filemap-split-filemap_readahead-out-of-filemap_get_pages.patch
mm-filemap-restructure-filemap_get_pages.patch
mm-filemap-dont-relock-the-page-after-calling-readpage.patch
mm-make-pagecache-tagged-lookups-return-only-head-pages.patch
mm-shmem-use-pagevec_lookup-in-shmem_unlock_mapping.patch
mm-swap-optimise-get_shadow_from_swap_cache.patch
mm-add-fgp_entry.patch
mm-filemap-rename-find_get_entry-to-mapping_get_entry.patch
mm-filemap-add-helper-for-finding-pages.patch
mm-filemap-add-helper-for-finding-pages-fix.patch
mm-filemap-add-mapping_seek_hole_data.patch
mm-filemap-add-mapping_seek_hole_data-fix.patch
iomap-use-mapping_seek_hole_data.patch
mm-add-and-use-find_lock_entries.patch
mm-add-and-use-find_lock_entries-fix.patch
mm-add-an-end-parameter-to-find_get_entries.patch
mm-add-an-end-parameter-to-pagevec_lookup_entries.patch
mm-remove-nr_entries-parameter-from-pagevec_lookup_entries.patch
mm-pass-pvec-directly-to-find_get_entries.patch
mm-remove-pagevec_lookup_entries.patch
