/* Portable shim for <linux/fs.h>.
** btrfs.h includes this header but only references FS_IOC_GETFSLABEL /
* FS_IOC_SETFSLABEL inside `#ifndef` guards — leaving them undefined
* lets btrfs.h fall back to its own BTRFS_IOC_GET_FSLABEL definition.
*/#ifndef _LINUX_FS_H
#define_LINUX_FS_H#endif/* _LINUX_FS_H */