Quoting Chris Wilson (2019-03-15 15:03:27)
> +static int create_clone(struct i915_user_extension __user *ext, void *data)
> +{
> + static int (* const fn[])(struct i915_gem_context *dst,
> + struct i915_gem_context *src) = {
> + [ilog2(I915_CONTEXT_CLONE_FLAGS)] = clone_flags,
> + [ilog2(I915_CONTEXT_CLONE_SCHEDATTR)] = clone_schedattr,
> + [ilog2(I915_CONTEXT_CLONE_SSEU)] = clone_sseu,
> + [ilog2(I915_CONTEXT_CLONE_TIMELINE)] = clone_timeline,
> + [ilog2(I915_CONTEXT_CLONE_VM)] = clone_vm,
> + };
Should be able to do something like
BUILD_BUG_ON(GENMASK(ARRAY_SIZE(fn)-1, 0) != I915_CONTEXT_CLONE_UNKNOWN);
-Chris
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