Subject: linux-next: manual merge of the vfs_brauner tree with the btrfs tree

From: Stephen Rothwell <[email-masked]>
Date: Mon, 24 Nov 2025 10:05:08 +1100

Hi all,

After merging the vfs-brauner tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

In file included from include/linux/bits.h:30,
                 from include/linux/gfp_types.h:5,
                 from include/linux/gfp.h:5,
                 from include/linux/slab.h:16,
                 from fs/btrfs/ordered-data.c:6:
fs/btrfs/ordered-data.c: In function 'btrfs_mark_ordered_io_truncated':
fs/btrfs/ordered-data.c:561:37: error: implicit declaration of function 'folio_end'; did you mean 'folio_nid'? [-Wimplicit-function-declaration]
  561 |         ASSERT(file_offset + len <= folio_end(folio));
      |                                     ^~~~~~~~~
include/linux/build_bug.h:30:63: note: in definition of macro 'BUILD_BUG_ON_INVALID'
   30 | #define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))
      |                                                               ^
fs/btrfs/ordered-data.c:561:9: note: in expansion of macro 'ASSERT'
  561 |         ASSERT(file_offset + len <= folio_end(folio));
      |         ^~~~~~
In file included from include/linux/bits.h:30,
                 from include/linux/bitops.h:6,
                 from fs/btrfs/extent_io.c:3:
fs/btrfs/extent_io.c: In function 'submit_range':
fs/btrfs/extent_io.c:1621:31: error: implicit declaration of function 'folio_end'; did you mean 'folio_nid'? [-Wimplicit-function-declaration]
 1621 |         ASSERT(start + len <= folio_end(folio));
      |                               ^~~~~~~~~
include/linux/build_bug.h:30:63: note: in definition of macro 'BUILD_BUG_ON_INVALID'
   30 | #define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))
      |                                                               ^
fs/btrfs/extent_io.c:1621:9: note: in expansion of macro 'ASSERT'
 1621 |         ASSERT(start + len <= folio_end(folio));
      |         ^~~~~~

Caused by commit

  48f3784b17d9 ("btrfs: Use folio_next_pos()")

interatcing with commits

  98dad9ca0426 ("btrfs: reduce extent map lookup during writes")
  c7459b067d9d ("btrfs: make sure all ordered extents beyond EOF is properly truncated")

from the btrfs tree.

I applied the following merge fix patch.

From: Stephen Rothwell <[email-masked]>
Date: Mon, 24 Nov 2025 09:51:32 +1100
Subject: [PATCH] fix up for "btrfs: Use folio_next_pos()"

interacting with commits

  98dad9ca0426 ("btrfs: reduce extent map lookup during writes")
  c7459b067d9d ("btrfs: make sure all ordered extents beyond EOF is properly truncated")

from the btrfs tree.

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 fs/btrfs/extent_io.c    | 2 +-
 fs/btrfs/ordered-data.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 995439dff185..3e4056dd8b55 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1618,7 +1618,7 @@ static int submit_range(struct btrfs_inode *inode, struct folio *folio,
 
 	ASSERT(IS_ALIGNED(start, sectorsize));
 	ASSERT(IS_ALIGNED(len, sectorsize));
-	ASSERT(start + len <= folio_end(folio));
+	ASSERT(start + len <= folio_next_pos(folio));
 
 	while (cur < start + len) {
 		struct extent_map *em;
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 51c0a910ea81..731032b40821 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -558,7 +558,7 @@ void btrfs_mark_ordered_io_truncated(struct btrfs_inode *inode, struct folio *fo
 	u64 cur = file_offset;
 
 	ASSERT(file_offset >= folio_pos(folio));
-	ASSERT(file_offset + len <= folio_end(folio));
+	ASSERT(file_offset + len <= folio_next_pos(folio));
 
 	while  (cur < file_offset + len) {
 		u32 cur_len = file_offset + len - cur;
-- 
2.51.1

-- 
Cheers,
Stephen Rothwell