Re: [PATCH 10/12] unwind: Simplify unwind_user_next_fp() alignment check

From: Peter Zijlstra

Date: Tue Oct 21 2025 - 13:19:00 EST


On Wed, Oct 01, 2025 at 11:55:24AM -0400, Steven Rostedt wrote:
> On Wed, 24 Sep 2025 09:59:58 +0200
> Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>
> I would add a change log. Something like:
>
> sizeof(long) is 4 or 8. Where 4 = 1 << 2 and 8 = 1 << 3.
> Calculating shift to be 2 or 3 and then passing that variable into
> (1 << shift) is the same as just using sizeof(long).

I've made it: "2^log_2(n) == n". I find it very hard to spend that many
words on something this trivial :-)