Buna ziua, Mai jos este un email scris in engleza pentru dezvoltatorii Linux. Imi puteti raspunde la el, va rog frumos ? Cu multe multumiri ! Alexandru Greetings ! I am a Unix/Linux hobbyist from Romania, interested in kernel stuff. I need some clarifications, related to block device subsystem in Linux 4, so I will ask them here, if you can answer me, please... 1) Why (in Linux 4) in struct block_device_operations, the (*open)(struct block_device *, fmode_t) has a different signature than the (*release)(struct gendisk *, fmode_t) ? Why open() uses block_device, while release() uses gendisk ? They are both in a struct block_device_operations. Why they not refer to the same thing ? I understand that gendisk refer to a real disk, and block_device (s) to logical disk (s) and partitions. But why the kernel developers have chosen to use different signatures ? 2) Release() is also synonim to close() ? 3) Why is not explicitely present a close() function ? 4) Why struct gendisk does not have inside it pointers to struct block_device ? Thank you very much, Alexander, Computer hobbyist, Romania