On Tue, 22 Apr 2008, Benjamin Herrenschmidt wrote:

quoted

 We currently have a problem with those two members of struct
 fb_fix_screeninfo. The struct contains an "unsigned long" which means
 that:

 - 64 bits kernels with 32 bits userspace can't pass a complete address
 - 32 bits machines with 64 bits resource_size_t can't pass a complete
 address
 - The structure isn't even properly padded to be 32/64 bits neutral in
 the first place.

 > We could define new versions of the struct with new get/set ioctls,

quoted

 or we could try to just deprecate those fields. What do you guys think ?

As userspace doesn't really need those fields[1], we can easily 
deprecate them.

kexec uses FBIOGET_FSCREENINFO and FBIOGET_VSCREENINFO. So if these 
ioctls changes, it will possibly break kexec under vesafb and efifb.

Scott


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