linux-kernel - Re: [PATCH] x86: xen: remove STACK_FRAME_NON_STANDARD from xen

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Date:   Tue, 17 May 2022 09:42:29 -0700
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     Maximilian Heyne <mheyne@...zon.de>
Cc:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: xen: remove STACK_FRAME_NON_STANDARD from xen_cpuid

On Tue, May 17, 2022 at 04:24:25PM +0000, Maximilian Heyne wrote:
> Since commit 4d65adfcd119 ("x86: xen: insn: Decode Xen and KVM
> emulate-prefix signature"), objtool is able to correctly parse the
> prefixed instruction in xen_cpuid and emit correct orc unwind
> information. Hence, marking the function as STACKFRAME_NON_STANDARD is
> no longer needed.
> 
> This commit is basically a revert of commit 983bb6d254c7 ("x86/xen: Mark
> xen_cpuid() stack frame as non-standard").
> 
> Signed-off-by: Maximilian Heyne <mheyne@...zon.de>
> CC: Josh Poimboeuf <jpoimboe@...nel.org>
> 
> cr: https://code.amazon.com/reviews/CR-69645080
      ^^^^^

This looks like an internal amazon link and should be removed.
Otherwise, looks good to me.

Acked-by: Josh Poimboeuf <jpoimboe@...nel.org>

-- 
Josh