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btrfs: backref, constify some arguments 

This constifies a few buffers used in the backref code.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jeff Mahoney 2017-06-28 21:56:55 -06:00 committed by David Sterba
parent 9a35b63728
commit 73980becae
1 changed files with 16 additions and 13 deletions
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29
fs/btrfs/backref.c
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@ -299,10 +299,11 @@ static int ref_tree_add(struct ref_root *ref_tree, u64 root_id, u64 object_id,
return 0;
}
static int check_extent_in_eb(struct btrfs_key *key, struct extent_buffer *eb,
struct btrfs_file_extent_item *fi,
u64 extent_item_pos,
struct extent_inode_elem **eie)
static int check_extent_in_eb(const struct btrfs_key *key,
const struct extent_buffer *eb,
const struct btrfs_file_extent_item *fi,
u64 extent_item_pos,
struct extent_inode_elem **eie)
{
u64 offset = 0;
struct extent_inode_elem *e;
@ -344,9 +345,9 @@ static void free_inode_elem_list(struct extent_inode_elem *eie)
}
}
static int find_extent_in_eb(struct extent_buffer *eb, u64 wanted_disk_byte,
u64 extent_item_pos,
struct extent_inode_elem **eie)
static int find_extent_in_eb(const struct extent_buffer *eb,
u64 wanted_disk_byte, u64 extent_item_pos,
struct extent_inode_elem **eie)
{
u64 disk_byte;
struct btrfs_key key;
@ -456,7 +457,7 @@ void btrfs_prelim_ref_exit(void)
*/
static int __add_prelim_ref(struct list_head *head, u64 root_id,
struct btrfs_key *key, int level,
const struct btrfs_key *key, int level,
u64 parent, u64 wanted_disk_byte, int count,
gfp_t gfp_mask)
{
@ -1649,7 +1650,7 @@ int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
struct btrfs_key key;
struct btrfs_key found_key;
struct btrfs_inode_extref *extref;
struct extent_buffer *leaf;
const struct extent_buffer *leaf;
unsigned long ptr;
key.objectid = inode_objectid;
@ -1806,7 +1807,7 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
u64 flags;
u64 size = 0;
u32 item_size;
struct extent_buffer *eb;
const struct extent_buffer *eb;
struct btrfs_extent_item *ei;
struct btrfs_key key;
@ -1874,9 +1875,11 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
* next ref. after the last ref was processed, 1 is returned.
* returns <0 on error
*/
static int __get_extent_inline_ref(unsigned long *ptr, struct extent_buffer *eb,
struct btrfs_key *key,
struct btrfs_extent_item *ei, u32 item_size,
static int __get_extent_inline_ref(unsigned long *ptr,
const struct extent_buffer *eb,
const struct btrfs_key *key,
const struct btrfs_extent_item *ei,
u32 item_size,
struct btrfs_extent_inline_ref **out_eiref,
int *out_type)
{