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| author |   Jeff Mahoney <jeffm@suse.com> | 2017-06-28 21:56:53 -0600 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2017-08-16 14:19:53 +0200 |
| commit | 1cbb1f454e5321e47fc1e6b233066c7ccc979d15 (patch) | |
| tree | 574441acf725ed6fc7dc370c0c1d298989051981 /fs/btrfs/struct-funcs.c | |
| parent | btrfs: remove unused sectorsize member (diff) | |
| download | linux-dev-1cbb1f454e5321e47fc1e6b233066c7ccc979d15.tar.xz linux-dev-1cbb1f454e5321e47fc1e6b233066c7ccc979d15.zip | |
btrfs: struct-funcs, constify readers
We have reader helpers for most of the on-disk structures that use
an extent_buffer and pointer as offset into the buffer that are
read-only. We should mark them as const and, in turn, allow consumers
of these interfaces to mark the buffers const as well.
No impact on code, but serves as documentation that a buffer is intended
not to be modified.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/struct-funcs.c')
| -rw-r--r-- | fs/btrfs/struct-funcs.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c index 875c757e73e2..5e2b92d83617 100644 --- a/fs/btrfs/struct-funcs.c +++ b/fs/btrfs/struct-funcs.c @@ -50,8 +50,8 @@ static inline void put_unaligned_le8(u8 val, void *p) */ #define DEFINE_BTRFS_SETGET_BITS(bits) \ -u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ - unsigned long off, \ +u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ + const void *ptr, unsigned long off, \ struct btrfs_map_token *token) \ { \ unsigned long part_offset = (unsigned long)ptr; \ @@ -90,7 +90,8 @@ u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ return res; \ } \ void btrfs_set_token_##bits(struct extent_buffer *eb, \ - void *ptr, unsigned long off, u##bits val, \ + const void *ptr, unsigned long off, \ + u##bits val, \ struct btrfs_map_token *token) \ { \ unsigned long part_offset = (unsigned long)ptr; \ @@ -133,7 +134,7 @@ DEFINE_BTRFS_SETGET_BITS(16) DEFINE_BTRFS_SETGET_BITS(32) DEFINE_BTRFS_SETGET_BITS(64) -void btrfs_node_key(struct extent_buffer *eb, +void btrfs_node_key(const struct extent_buffer *eb, struct btrfs_disk_key *disk_key, int nr) { unsigned long ptr = btrfs_node_key_ptr_offset(nr); |