Revert "Revert "New API to retrieve disk stats in Linux""

This reverts commit 7e214414bf.

sysdeps/linux/glibtop_private.h

@@ -61,6 +61,9 @@ skip_line (const char *p)
 	return (char *) (*p ? p+1 : p);
 }
 
+int
+check_alphanumeric_word (const char *p);
+
 /*
  * Smart strtoul which handles binary suffixes
  * e.g: get_scaled("Size: 32 kB", "Size:") == 32768