-struct in_addr;
-
-extern int __weak posix_memalign(void **ptr, size_t align, size_t size);
-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,
+extern int fallocate(int fd, int mode, off_t offset, off_t len);
+extern int posix_fallocate(int fd, off_t offset, off_t len);
+#ifndef CONFIG_SYNC_FILE_RANGE
+extern int sync_file_range(int fd, uint64_t offset, uint64_t nbytes,