[LI] meaning of macros NR_OPEN NR_FILE

[anil kumar <anilk@xxxxxxxxxxxxxx>]

hello,
 just i was going through  the include  Directory of linux and i opened
"fs.h" and "file.h"  to  know how file system is implemented in linux.
 I  found two macros NR_OPEN && NR_FILE i could not understand the meaning
of these macros.
----------------------------------------------
File Location linux-2.0.36/include/linux/fs.h
----------------------------------------------
 After defining the macros this comment was written .
/*
 * It's silly to have NR_OPEN bigger than NR_FILE, but I'll fix
 * that later. Anyway, now the file code is no longer dependent
 * on bitmaps in unsigned longs, but uses the new fd_set structure..
 *
 * Some programs (notably those using select()) may have to be
 * recompiled to take full advantage of the new limits..
 */

  Please anybody elaborate the meaning of these macros.
bye anil



--------------------------------------------------------------------
The Linux India Mailing List Archives are now available.  Please search
the archive at http://lists.linux-india.org/ before posting your question
to avoid repetition and save bandwidth.