I am designing a device driver for linux kernel 2.4. When an interrupt occurs, the ISR schedules a tasklet for further processing. I have some data that is accessed from both, ioctl and the tasklet. Do I need to protect this data using critical section? If user calls ioctl, execution switches to kernel mode. If ioctl is modifying the common data structure when an interrupt occurs, can the tasklet (scheduled by ISR) run before execution gets back to ioctl? If this is possible then will putting the tasklet on scheduler queue avoid such scenario? I read the book "Linux Device Drivers" but was not able to figure out the possible "safe times" when the tasklet will be executed. Thanks for your time, Sripal __________________________________________________ Do You Yahoo!? Sign up for SBC Yahoo! Dial - First Month Free http://sbc.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
