quoted

I looked through a couple of drivers and none of them seem to touch the buffer
after it has been remapped. They only pass the pointer back to fbconsole.

What about
  - read from/write to /dev/fb*?
  - the logo code?

Logo code should be using imageblit which in non accelerated cases uses 
cfb_imageblit. So we need the pointer. Also the software cursor uses the
ioremap memory space. Plus read/write to /dev/fb*. So it is not just the 
fbconsole that uses screen_base. The problem is broken drivers that 
allocate way to much memory.





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