-#ifdef __linux__
-static int parse_version_number(const char *s)
-{
- int major, minor, rev;
- char *endptr;
- const char *cp = s;
-
- if (!s)
- return 0;
- major = strtol(cp, &endptr, 10);
- if (cp == endptr || *endptr != '.')
- return 0;
- cp = endptr + 1;
- minor = strtol(cp, &endptr, 10);
- if (cp == endptr || *endptr != '.')
- return 0;
- cp = endptr + 1;
- rev = strtol(cp, &endptr, 10);
- if (cp == endptr)
- return 0;
- return KERNEL_VERSION(major, minor, rev);
-}
-
-static int is_before_linux_ver(unsigned int major, unsigned int minor,
- unsigned int rev)
-{
- struct utsname ut;
- static int linux_version_code = -1;
-
- if (uname(&ut)) {
- perror("uname");
- exit(1);
- }
- if (linux_version_code < 0)
- linux_version_code = parse_version_number(ut.release);
- if (linux_version_code == 0)
- return 0;
-
- return linux_version_code < KERNEL_VERSION(major, minor, rev);
-}
-#else
-static int is_before_linux_ver(unsigned int major, unsigned int minor,
- unsigned int rev)
-{
- return 0;
-}
-#endif
-