[PATCH] arm64/mm: Fix annotated branch unbootable kernel

[Breno Leitao]

Hello Steven,

On Fri, Jan 09, 2026 at 02:50:22PM -0500, Steven Rostedt wrote:
> [ Resending with my kernel.org email, as I received a bunch of messages from gmail saying it's blocking me :-p ]
> 
> On Mon, 5 Jan 2026 21:15:40 +0000
> Will Deacon <will at kernel.org> wrote:
> 
> > > Another approach is to disable profiling on all arch/arm64 code, similarly to
> > > x86, where DISABLE_BRANCH_PROFILING is called for all arch/x86 code. See
> > > commit 2cbb20b008dba ("tracing: Disable branch profiling in noinstr
> > > code").  
> > 
> > Yes, let's start with arch/arm64/. We know that's safe and then if
> > somebody wants to make it finer-grained, it's on them to figure out a
> > way to do it without playing whack-a-mole.
> 
> OK, so by adding -DDISABLE_BRANCH_PROFILING to the Makefile configs and for
> the files that were audited, could be opt-in?

How to do the audit in this case? I suppose we want to disable branch
profiling for files that have any function that would eventually call
noinstr functions, right?