begin Christine Ames <clgisotti@yahoo.com> > --- Peter Jay Salzman <p@dirac.org> wrote: > > i'm trying to understand (in linux/module.h): > > > > /* Indirect stringification. */ > > #define __MODULE_STRING_1(x) #x > > #define __MODULE_STRING(x) __MODULE_STRING_1(x) > > > > which is used alot in MODULE_PARM (in linux/module.h): > > > > MODULE_PARM(mac, "1-" __MODULE_STRING(NS_MAX_CARDS) "s"); > > > > > > what is __MODULE_STRING() used for? in what sense does it perform > > "stringification"? > > > > Sorry I can't help you here. Prehaps someone with more experience > will chip in. Looks to my simple eyes that it does nothing. Prehaps > it's holding place for a real macro/function later...? john got this for me. :) > > also, i'm not understanding the 2nd argument of MODULE_PARM. i'd > > be > > happier with: > > > > MODULE_PARM(mac, "s"); > > > > there are two other items: "1-" and __MODULE_STRING(NS_MAX_CARDS). > > they > > belong to the 2nd argument, which identifies the type of the > > command > > line argument. i would've thought that would simply be "s" for a > > string. what do the two other items do? > > > > See http://www.xml.com/ldd/chapter/book/ch02.html#t6 for a nice > discussion. arg, right ... right. defining an array that takes commandline args. i didn't understand it before, because i had no idea what stringification was. he's defining an array of size NS_MAX_CARDS. the grammar confused me, but i got it now. thanks. pete -- GPG Fingerprint: B9F1 6CF3 47C4 7CD8 D33E 70A9 A3B9 1945 67EA 951D -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
