Re: [PATCH V3 5/9] objtool: Add return address unwind hints

[Peter Zijlstra]

On Tue, Apr 14, 2020 at 12:36:14PM +0200, Alexandre Chartre wrote:
> Add the UNWIND_HINT_RADDR_DELETE and UNWIND_HINT_RADDR_ALTER unwind
> hint macros to flag instructions which remove or modify return
> addresses.

I'm confused by this thing; why? AFAICT the rest of the patches are
actually simpler without this one.