tools/nolibc/types: move makedev to types.h and make it a macro

The makedev() man page says it's supposed to be a macro and that some
OSes have it with the other ones in sys/types.h so it now makes sense
to move it to types.h as a macro. Let's also define major() and
minor() that perform the reverse operation.
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

tools/include/nolibc/nolibc.h

@@ -116,13 +116,4 @@ const char *ltoa(long in)
 	return pos + 1;
 }
 
-/* Here come a few helper functions */
-
-/* WARNING, it only deals with the 4096 first majors and 256 first minors */
-static __attribute__((unused))
-dev_t makedev(unsigned int major, unsigned int minor)
-{
-	return ((major & 0xfff) << 8) | (minor & 0xff);
-}
-
 #endif /* _NOLIBC_H */

tools/include/nolibc/types.h

@@ -162,4 +162,9 @@ struct stat {
 	time_t    st_ctime;   /* time of last status change */
 };
 
+/* WARNING, it only deals with the 4096 first majors and 256 first minors */
+#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
+#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
+#define minor(dev) ((unsigned int)(((dev) & 0xff))
+
 #endif /* _NOLIBC_TYPES_H */