Re: [PATCH v2 -tip] x86/percpu: Use C for arch_raw_cpu_ptr()

[Josh Poimboeuf]

On Thu, Oct 12, 2023 at 08:19:14AM +0200, Ingo Molnar wrote:
> 
> * Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote:
> 
> > Though, another problem is that .text has a crazy amount of padding
> > which makes it always the same size, due to the SRSO alias mitigation
> > alignment linker magic.  We should fix that somehow.
> 
> We could emit a non-aligned end-of-text symbol (we might have it already),
> and have a script or small .c program in scripts/ or tools/ that looks
> at vmlinux and displays a user-friendly and accurate list of text and
> data sizes in the kernel?
> 
> And since objtool is technically an 'object files tool', and it already
> looks at sections & symbols, it could also grow a:
> 
> 	objtool size <objfile>
> 
> command that does the sane thing ... I'd definitely start using that, instead of 'size'.
> 
> /me runs :-)

Yeah, that's actually not a bad idea.

I had been thinking a "simple" script would be fine, but I'm realizing
the scope of this thing could grow over time.  In which case a script is
less than ideal.  And objtool already has the ability to do this pretty
easily.

-- 
Josh