Symbol: cow_file_range
fs/btrfs/inode.c
1797
ret = cow_file_range(inode, locked_folio, start, end,
fs/btrfs/inode.c
1886
ret = cow_file_range(inode, locked_folio, start, end, NULL,
fs/btrfs/inode.c
2465
return cow_file_range(inode, locked_folio, start, end, NULL, 0);