> I thought I could make fd=open("/dev/visu", 0) in init of the
> driver 2 but I
> get ooops.
To open a device from kernel mode, you need to:
/* Bypass argument validity check in FS calls. See <asm/uaccess.h> */
mm_segment_t oldfs = get_fs();
set_fs(KERNEL_DS);
fd=open("/dev/visu", 0)
/* Restore argument validity check */
set_fs(oldfs);
> I also need to make something like ioctl(fd, IO_Special...
> )but the function
> ioctl is unknown in the kernel.
To have the ioctl, you should add to the beginning of your source file:
#include <linux/unistd.h>
/* Declare "ioctl" system call */
static inline _syscall3(int,ioctl,int,fd,int,request,void*,arg1)
Regards,
--------------------------------------------
Jean-Denis Boyer, Software Designer
M5T Centre d'Excellence en T?l?com Inc.
4283 Garlock Street
Sherbrooke (Qu?bec)
J1L 2C8 CANADA
(819)829-3972 x241
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