extern int __weak posix_fallocate(int fd, off_t offset, off_t len);
extern int __weak inet_aton(const char *cp, struct in_addr *inp);
extern int __weak clock_gettime(clockid_t clk_id, struct timespec *ts);
+extern int __weak sync_file_range(int fd, off64_t offset, off64_t nbytes,
+ unsigned int flags);
#endif