> Do kernel modules need to be aware that they are running in a 64-bit
> kernel or a 32-bit kernel?
Yes, if they want to support 32bit programs in a 64bit kernel they
usually need ioctl translation and sometimes syscall translation
(if they have own ioctls or syscalls)
> How should be the modules be written so they work both on 32/64-bit
> kernel AND can interact with both 32/64-bit userspace programs in
> a 64-bit kernel??
http://www.firstfloor.org/~andi/writing-ioctl32
-Andi
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