btrfs: Streamline log_extent_csums a bit

Currently this function takes the root as an argument only to get the
log_root from it. Simplify this by directly passing the log root from
the caller. Also eliminate the fs_info local variable, since it's used
only once, so directly reference it from the transaction handle.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index daf32dc..7f6aaeb 100644 (file)
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -4064,11 +4064,9 @@ static int extent_cmp(void *priv, struct list_head *a, struct list_head *b)
 
 static int log_extent_csums(struct btrfs_trans_handle *trans,
                            struct btrfs_inode *inode,
-                           struct btrfs_root *root,
+                           struct btrfs_root *log_root,
                            const struct extent_map *em)
 {
-       struct btrfs_fs_info *fs_info = root->fs_info;
-       struct btrfs_root *log = root->log_root;
        u64 csum_offset;
        u64 csum_len;
        LIST_HEAD(ordered_sums);
@@ -4089,7 +4087,7 @@ static int log_extent_csums(struct btrfs_trans_handle *trans,
        }
 
        /* block start is already adjusted for the file extent offset. */
-       ret = btrfs_lookup_csums_range(fs_info->csum_root,
+       ret = btrfs_lookup_csums_range(trans->fs_info->csum_root,
                                       em->block_start + csum_offset,
                                       em->block_start + csum_offset +
                                       csum_len - 1, &ordered_sums, 0);
@@ -4101,7 +4099,7 @@ static int log_extent_csums(struct btrfs_trans_handle *trans,
                                                   struct btrfs_ordered_sum,
                                                   list);
                if (!ret)
-                       ret = btrfs_csum_file_blocks(trans, log, sums);
+                       ret = btrfs_csum_file_blocks(trans, log_root, sums);
                list_del(&sums->list);
                kfree(sums);
        }
@@ -4125,7 +4123,7 @@ static int log_one_extent(struct btrfs_trans_handle *trans,
        int ret;
        int extent_inserted = 0;
 
-       ret = log_extent_csums(trans, inode, root, em);
+       ret = log_extent_csums(trans, inode, log, em);
        if (ret)
                return ret;