filemap: remove readahead_page()

Patch series "Misc folio patches for 6.16".

Remove a few APIs that we've converted everybody from using.  I also found
a few places that extract a page pointer from i_pages, which will be an
invalid thing to do when we separate pages from folios.

This patch (of 8):

All filesystems have now been converted to call readahead_folio() so we
can delete this wrapper.

Link: https://lkml.kernel.org/r/20250402210612.2444135-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20250402210612.2444135-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 26baa78f1ca7d8d04e6f071ef4e0bb150a508a04..cd4bd0f8e5f63487c59e94228b988819586095c6 100644 (file)
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -1308,9 +1308,9 @@ static inline bool filemap_range_needs_writeback(struct address_space *mapping,
  * struct readahead_control - Describes a readahead request.
  *
  * A readahead request is for consecutive pages.  Filesystems which
- * implement the ->readahead method should call readahead_page() or
- * readahead_page_batch() in a loop and attempt to start I/O against
- * each page in the request.
+ * implement the ->readahead method should call readahead_folio() or
+ * __readahead_batch() in a loop and attempt to start reads into each
+ * folio in the request.
  *
  * Most of the fields in this struct are private and should be accessed
  * by the functions below.
@@ -1415,22 +1415,6 @@ static inline struct folio *__readahead_folio(struct readahead_control *ractl)
        return folio;
 }
 
-/**
- * readahead_page - Get the next page to read.
- * @ractl: The current readahead request.
- *
- * Context: The page is locked and has an elevated refcount.  The caller
- * should decreases the refcount once the page has been submitted for I/O
- * and unlock the page once all I/O to that page has completed.
- * Return: A pointer to the next page, or %NULL if we are done.
- */
-static inline struct page *readahead_page(struct readahead_control *ractl)
-{
-       struct folio *folio = __readahead_folio(ractl);
-
-       return &folio->page;
-}
-
 /**
  * readahead_folio - Get the next folio to read.
  * @ractl: The current readahead request.