[PATCH 6/7] mm: remove FGP_ENTRY

Christoph Hellwig
2023-01-21T06:58:31Z

FGP_ENTRY is unused now, so remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/pagemap.h | 3 +--
mm/filemap.c | 7 +------
mm/folio-compat.c | 4 ++--
3 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 24dedf6b12be49..e2208ee36966ea 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -504,8 +504,7 @@ pgoff_t page_cache_prev_miss(struct address_space *mapping,
#define FGP_NOFS 0x00000010
#define FGP_NOWAIT 0x00000020
#define FGP_FOR_MMAP 0x00000040
-#define FGP_ENTRY 0x00000080
-#define FGP_STABLE 0x00000100
+#define FGP_STABLE 0x00000080

void *filemap_get_entry(struct address_space *mapping, pgoff_t index);
struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index,
diff --git a/mm/filemap.c b/mm/filemap.c
index ed0583f9e27512..35baadd130795c 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1889,8 +1889,6 @@ void *filemap_get_entry(struct address_space *mapping, pgoff_t index)
*
* * %FGP_ACCESSED - The folio will be marked accessed.
* * %FGP_LOCK - The folio is returned locked.
- * * %FGP_ENTRY - If there is a shadow / swap / DAX entry, return it
- * instead of allocating a new folio to replace it.
* * %FGP_CREAT - If no page is present then a new page is allocated using
* @gfp and added to the page cache and the VM's LRU list.
* The page is returned locked and with an increased refcount.
@@ -1916,11 +1914,8 @@ struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index,

repeat:
folio = filemap_get_entry(mapping, index);
- if (xa_is_value(folio)) {
- if (fgp_flags & FGP_ENTRY)
- return folio;
+ if (xa_is_value(folio))
folio = NULL;
- }
if (!folio)
goto no_page;

diff --git a/mm/folio-compat.c b/mm/folio-compat.c
index 18c48b55792635..f3841b4977b68e 100644
--- a/mm/folio-compat.c
+++ b/mm/folio-compat.c
@@ -97,8 +97,8 @@ struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index,
struct folio *folio;

folio = __filemap_get_folio(mapping, index, fgp_flags, gfp);
- if (!folio || xa_is_value(folio))
- return &folio->page;
+ if (!folio)
+ return NULL;
return folio_file_page(folio, index);
}
EXPORT_SYMBOL(pagecache_get_page);
--
2.39.0