[Concept,4/9] fs: ext4l: Add folio helper macros
Commit Message
From: Simon Glass <simon.glass@canonical.com>
Add folio_next_pos() and fgf_set_order() macros to ext4_uboot.h to
match the Linux kernel API.
folio_next_pos() returns the byte position following a folio, useful
for checking if a folio extends past a given position.
fgf_set_order() is a stub that returns 0 since U-Boot doesn't support
large folios. In Linux, this is used to request a specific folio size
when allocating.
Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
---
fs/ext4l/ext4_uboot.h | 7 +++++++
1 file changed, 7 insertions(+)
@@ -1565,7 +1565,14 @@ static inline char *d_path(const struct path *path, char *buf, int buflen)
#define folio_zero_range(f, s, l) do { } while (0)
#define folio_mark_uptodate(f) do { } while (0)
#define folio_next_index(f) ((f)->index + 1)
+#define folio_next_pos(f) ((loff_t)folio_next_index(f) << PAGE_SHIFT)
#define folio_mapped(f) (0)
+
+/*
+ * fgf_set_order - Set the order (size) for folio allocation
+ * U-Boot doesn't support large folios, so this is a no-op stub.
+ */
+#define fgf_set_order(size) (0)
#define folio_clear_dirty_for_io(f) ({ (void)(f); 1; })
#define folio_clear_uptodate(f) do { } while (0)
#define folio_batch_release(fb) do { } while (0)