btrfs_remap_file_range 2951 fs/btrfs/ctree.h loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in,
btrfs_remap_file_range 3481 fs/btrfs/file.c 	.remap_file_range = btrfs_remap_file_range,