Well you might be knowing that a driver can handle more than one device (either of same type or of different types). You are correct that one major number can not be shared between two or more drivers. I have never seen any sharing of major number between different drivers. The possible way is (I suppose you are thinking the same way), that a driver can handle more than one type of devices (e.g. HDD and Floppy), in this case a driver can acquire Major Number and can use Minor Numbers to identify a particular device. Cheers !! Gaurav -----Original Message----- From: kernelnewbies-bounce@xxxxxxxxxxxx [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of Zeeshan Ali Sent: Wednesday, September 29, 2004 12:58 PM To: kernelnewbies@xxxxxxxxxxxx Subject: Sharing of major number Hello, AFAIK, the the major number identifies the device TYPES rather than devices themselves and no major number could be registered by more than one driver. My question is how does different drivers for different devices share the same major number then? NOTE: I am not talking of different device INSTANCES but different devices which have different device drivers. Thanks in advance. ------------------------------------------------- "All over the place, from the popular culture to the propaganda system, there is a constant pressure to make people feel that they are helpless, that the only role they can have is to ratify decisions and to consume." -- Noam Chomsky -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
