linux-kernel - Re: [PATCH v3 08/10] x86: BHI stubs

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Message-ID: <20250219180758.GB23004@noisy.programming.kicks-ass.net>
Date: Wed, 19 Feb 2025 19:07:58 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Kees Cook <kees@...nel.org>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, alyssa.milburn@...el.com,
	scott.d.constable@...el.com, joao@...rdrivepizza.com,
	andrew.cooper3@...rix.com, jpoimboe@...nel.org,
	jose.marchesi@...cle.com, hjl.tools@...il.com,
	ndesaulniers@...gle.com, samitolvanen@...gle.com, nathan@...nel.org,
	ojeda@...nel.org, alexei.starovoitov@...il.com, mhiramat@...nel.org,
	jmill@....edu
Subject: Re: [PATCH v3 08/10] x86: BHI stubs

On Wed, Feb 19, 2025 at 10:07:04AM -0800, Kees Cook wrote:
> On Wed, Feb 19, 2025 at 05:21:15PM +0100, Peter Zijlstra wrote:
> > --- a/arch/x86/lib/Makefile
> > +++ b/arch/x86/lib/Makefile
> > @@ -66,5 +66,6 @@ endif
> >          lib-y += clear_page_64.o copy_page_64.o
> >          lib-y += memmove_64.o memset_64.o
> >          lib-y += copy_user_64.o copy_user_uncached_64.o
> > -	lib-y += cmpxchg16b_emu.o
> > +        lib-y += cmpxchg16b_emu.o
> > +        lib-y += bhi.o
> >  endif
> 
> Unrelated whitespace fix?

Yes, I could not leave the cmpxchg16b thing mis-aligned :-)