btrfs: separate superblock items out of fs_info

fs_info has now ~9kb, more than fits into one page. This will cause
mount failure when memory is too fragmented. Top space consumers are
super block structures super_copy and super_for_commit, ~2.8kb each.
Allocate them dynamically. fs_info will be ~3.5kb. (measured on x86_64)

Add a wrapper for freeing fs_info and all of it's dynamically allocated
members.

Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a8586e10953c..b6b612e14ed7 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -824,7 +824,7 @@ static noinline int cow_file_range(struct inode *inode,
         }
 
         BUG_ON(disk_num_bytes >
-               btrfs_super_total_bytes(&root->fs_info->super_copy));
+               btrfs_super_total_bytes(root->fs_info->super_copy));
 
         alloc_hint = get_extent_allocation_hint(inode, start, num_bytes);
         btrfs_drop_extent_cache(inode, start, start + num_bytes - 1, 0);