James Pearson wrote: > m.roth at 5-cent.us wrote: >> I want to add a sleep() to a module. It tells me it can't find <time.h>; >> if I tell it "/usr/include/time.h", it gives me a ton of errors (I >> *have* >> put the #include just above where I call sleep, not up at the top). >> >> Any clues as to what I'm doing wrong? With kernel >> /vmlinuz-2.6.18-194.3.1.el5, I just added the line >> extern unsigned int sleep( unsigned int seconds ); >> and everything was wonderful; with the current kernel, it complains >> sleep >> is undefined. > > The kernel doesn't use include files from /usr/include - it uses its own > from its own include directory > I did finally find that out, after I posted, and it makes sense, since it's *got* to be statically linked. > You probably want to use something like ssleep(), msleep() or mdelay() - > see include/linux/delay.h and kernel/timer.c I see, and thanks! I note there's no man page for any of them. Also, this is, um, odd: going to 5.5, I started getting garbage in the logs for gspca (for an old video camera; we have a number, for security, in our locked server rooms); I added a sleep, as I mentioned, and it worked fine. Then it stopped working... and with the latest kernel, suddenly, it works fine again, *without* the sleep(). Dunno, dunno, some timing thing. Again, thanks, and I *will* push that info onto the stack, to be popped off when needed next. mark