Btrfs: remove unused hint byte argument for btrfs_drop_extents

I audited all users of btrfs_drop_extents and found that nobody actually uses
the hint_byte argument.  I'm sure it was used for something at some point but
it's not used now, and the way the pinning works the disk bytenr would never be
immediately useful anyway so lets just remove it.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>

1 files changed, 3 insertions, 9 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 24745b8f2745..f0a4792492ed 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -230,7 +230,6 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans,
         u64 inline_len = actual_end - start;
         u64 aligned_end = (end + root->sectorsize - 1) &
                         ~((u64)root->sectorsize - 1);
-        u64 hint_byte;
         u64 data_len = inline_len;
         int ret;
 
@@ -247,8 +246,7 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans,
                 return 1;
         }
 
-        ret = btrfs_drop_extents(trans, root, inode, start, aligned_end,
-                                 &hint_byte, 1);
+        ret = btrfs_drop_extents(trans, root, inode, start, aligned_end, 1);
         if (ret)
                 return ret;
 
@@ -1786,7 +1784,6 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
         struct btrfs_path *path;
         struct extent_buffer *leaf;
         struct btrfs_key ins;
-        u64 hint;
         int ret;
 
         path = btrfs_alloc_path();
@@ -1805,8 +1802,7 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
          * with the others.
          */
         ret = btrfs_drop_extents(trans, root, inode, file_pos,
-                                 file_pos + num_bytes,
-                                 &hint, 0);
+                                 file_pos + num_bytes, 0);
         if (ret)
                 goto out;
 
@@ -3629,7 +3625,6 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
                 last_byte = (last_byte + mask) & ~mask;
                 if (!test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
                         struct extent_map *hole_em;
-                        u64 hint_byte = 0;
                         hole_size = last_byte - cur_offset;
 
                         trans = btrfs_start_transaction(root, 3);
@@ -3640,8 +3635,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
 
                         err = btrfs_drop_extents(trans, root, inode,
                                                  cur_offset,
-                                                 cur_offset + hole_size,
-                                                 &hint_byte, 1);
+                                                 cur_offset + hole_size, 1);
                         if (err) {
                                 btrfs_abort_transaction(trans, root, err);
                                 btrfs_end_transaction(trans, root);