We have grown a number of different implementations of
DIV_ROUND_CLOSEST_ULL throughout the kernel. Move the i915 one to
kernel.h so that it can be reused.
Cc: Jani Nikula
Cc: David Airlie
Cc: Guenter Roeck
Cc: Andrew Morton
Acked-by: Daniel Vetter
Signed-off-by: Javi Merino
---
drivers/gp
[for just patch 1/4; I didn't look as closely at the others]
Reviewed-by: Jeff Epler
...with one half of a caveat (rounded up?): Like most or all of the
originals, and like DIV_ROUND_CLOSEST just above it in kernel.h, the new
code gives an incorrect answer if the temporary overflows at
+ un
