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On Sat, Feb 12, 2005 at 02:25:17PM +0100, Reinoud Zandijk wrote:
> > Won't this cause problems if the ioctl wants to sleep ?
> 
> that might be an issue yes.... a solution could be to add a flag to the 
> `flag' int as passed in the ioctl handler: 
> 
> ...ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, proc *p)
> 
> Since its not documentated wich values this `flag' argument can have, i 
> can't add it now for a test-patch.

AHUM, reading <sys/fcntl.h> i read that its FREAD, FWRITE flags and 
friends.... so a FKERNELADDR could be added indeed.

> 
> Still apart from this messaging of kernel/userland space, wouldn't it be 
> nice to have a kind of `copyout' function that would DTRT in all 
> situations?

hmmm add the flags to copyout() and the like? i.e. copyout(flags, ...)

Cheers,
Reinoud


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