Quoting YueHaibing (2020-01-07 13:50:14)
> Fix build error:
> ./drivers/gpu/drm/i915/selftests/i915_random.h: In function i915_prandom_u32_max_state:
> ./drivers/gpu/drm/i915/selftests/i915_random.h:48:23: error:
> implicit declaration of function mul_u32_u32; did you mean mul_u64_u32_div? [-Werror=implicit-function-declaration]
> return upper_32_bits(mul_u32_u32(prandom_u32_state(state), ep_ro));
>
> Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
> Fixes: 7ce5b6850b47 ("drm/i915/selftests: Use mul_u32_u32() for 32b x 32b -> 64b result")
While technically true, that doesn't explain why it only just started
appearing on -next.
-Chris
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