On 4/20/06, Talib Alim <talibalm@xxxxxxxxxxx> wrote: > My module pass back pointer to user application when device is opened. From > that point, user application request different services from my module. > > In order to avoid any lookup overhead, kernel virtual pointer is passed back > to user application. Kernel virtual address will not at all be accessable in user space and not at all recommended. If you want to request different services from driver, whydont u use IOCTL mechanisum, define you ioclt command and use them. Kernel virtual address are greater than 3G where as user can have maximum virtual address as 3G, correct me if I am worng. Gaurav > > Talib > > >On 4/20/06, Talib Alim <talibalm@xxxxxxxxxxx> wrote: > > > A kernel virtual address is passed to my module. In order to avoid any > > > chances of a crash, how can I verify this pointer is pointing to a > >mapped > > > memory location. > > > >Can you elaborate more on this ? > > _________________________________________________________________ > Express yourself instantly with MSN Messenger! Download today - it's FREE! > http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ > > -- -- -Gaurav Email: gauravd.chd@xxxxxxxxx --------------------------------- Read my blog at: http://lkdp.blogspot.com/ --------------------------------- -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
