These are the folio replacements for shmem_read_mapping_page()
and shmem_read_mapping_page_gfp().
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
include/linux/shmem_fs.h | 8 ++++++++
mm/shmem.c | 34 +++++++++++++++++++++-------------
2 files changed, 29 insertions(+), 13 deletions(-)
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index d09d54be4ffd..103d1000a5a2 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -109,6 +109,14 @@ enum sgp_type {
int shmem_get_folio(struct inode *inode, pgoff_t index, struct folio **foliop,
enum sgp_type sgp);
+struct folio *shmem_read_folio_gfp(struct address_space *mapping,
+ pgoff_t index, gfp_t gfp);
+
+static inline struct folio *shmem_read_folio(struct address_space *mapping,
+ pgoff_t index)
+{
+ return shmem_read_folio_gfp(mapping, index, mapping_gfp_mask(mapping));
+}
static inline struct page *shmem_read_mapping_page(
struct address_space *mapping, pgoff_t index)
diff --git a/mm/shmem.c b/mm/shmem.c
index 28f3c699c8ce..d333deddc2b9 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4320,9 +4320,9 @@ int shmem_zero_setup(struct vm_area_struct *vma)
}
/**
- * shmem_read_mapping_page_gfp - read into page cache, using specified page allocation flags.
- * @mapping: the page's address_space
- * @index: the page index
+ * shmem_read_folio_gfp - read into page cache, using specified page allocation flags.
+ * @mapping: the folio's address_space
+ * @index: the folio index
* @gfp: the page allocator flags to use if allocating
*
* This behaves as a tmpfs "read_cache_page_gfp(mapping, index, gfp)",
@@ -4334,13 +4334,12 @@ int shmem_zero_setup(struct vm_area_struct *vma)
* i915_gem_object_get_pages_gtt() mixes __GFP_NORETRY | __GFP_NOWARN in
* with the mapping_gfp_mask(), to avoid OOMing the machine unnecessarily.
*/
-struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
- pgoff_t index, gfp_t gfp)
+struct folio *shmem_read_folio_gfp(struct address_space *mapping,
+ pgoff_t index, gfp_t gfp)
{
#ifdef CONFIG_SHMEM
struct inode *inode = mapping->host;
struct folio *folio;
- struct page *page;
int error;
BUG_ON(!shmem_mapping(mapping));
@@ -4350,18 +4349,27 @@ struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
return ERR_PTR(error);
folio_unlock(folio);
- page = folio_file_page(folio, index);
+ return folio;
+#else
+ /*
+ * The tiny !SHMEM case uses ramfs without swap
+ */
+ return mapping_read_folio_gfp(mapping, index, gfp);
+#endif
+}
+EXPORT_SYMBOL_GPL(shmem_read_folio_gfp);
+
+struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
+ pgoff_t index, gfp_t gfp)
+{
+ struct folio *folio = shmem_read_folio_gfp(mapping, index, gfp);
+ struct page *page = folio_file_page(folio, index);
+
if (PageHWPoison(page)) {
folio_put(folio);
return ERR_PTR(-EIO);
}
return page;
-#else
- /*
- * The tiny !SHMEM case uses ramfs without swap
- */
- return read_cache_page_gfp(mapping, index, gfp);
-#endif
}
EXPORT_SYMBOL_GPL(shmem_read_mapping_page_gfp);
--
2.35.1
