"Hen, Shmulik" wrote: > the thing is I need to prevent Tx/Rx when a topology change is initiated > from the ioctl (registering a virtual adapter is just one example), so they > all share a single lock and I must use spin_lock_bh from the ioctl. I do not think that they all need to shared a single lock. And we don't have your code, but spin_lock_bh may be an incorrect choice too. Note that when topology changes, that is an operation which might take more than a few milliseconds. Therefore, your solution should do something OTHER than spinning on a lock, while topology is changing. dev->open and dev->do_ioctl are called with rtnl_lock already held. You can sleep in them. Use that to your advantage... -- Jeff Garzik | Building 1024 | Would you like a Twinkie? MandrakeSoft | - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org
