The bullshit part is that Intel is trying to push this as a 'solution'. Linux is incredibly important, so if Linus does not approve of this 'solution', it'll be very difficult for Intel to go through with it (of course, they could also be brash and still do it).
See my second message (next to yours), it's not just that, yes he thinks and clearly says that thissolution is terrible but that's not why he calls them out to be basically liars; this one is because they put useless filler garbage code all around to hide what's happening in their patches.
I think we're lucky to have someone as clear, outspoken and refusing such crap in charge of the kernel.
Part of the problem is Linus doesn't actually understand the different portions of what Intel is doing, and is mixing up IBPB and IBRS. They do different things, and he's thinking they're all part of the same thing.
This could be a sign that these things are poorly written and need to be refactored into something more obvious, or it could be that they're so fundamentally complex that it's going to be difficult to grasp without context.
