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Date:   Wed, 21 Jun 2023 20:36:39 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Ricardo Ribalda <ribalda@chromium.org>
Cc:     stable@vger.kernel.org, Albert Ou <aou@eecs.berkeley.edu>,
        Baoquan He <bhe@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Dave Young <dyoung@redhat.com>,
        "Eric W . Biederman" <ebiederm@xmission.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Nathan Chancellor <nathan@kernel.org>,
        Nicholas Piggin <npiggin@gmail.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Palmer Dabbelt <palmer@rivosinc.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Philipp Rudo <prudo@redhat.com>,
        Ross Zwisler <zwisler@google.com>,
        Simon Horman <horms@kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Tom Rix <trix@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 4.19.y] x86/purgatory: remove PGO flags
Message-ID: <2023062129-jockstrap-unripe-5215@gregkh>
References: <2023061700-surplus-art-1fef@gregkh>
 <20230619113806.218802-1-ribalda@chromium.org>
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On Mon, Jun 19, 2023 at 01:38:06PM +0200, Ricardo Ribalda wrote:
> If profile-guided optimization is enabled, the purgatory ends up with
> multiple .text sections.  This is not supported by kexec and crashes the
> system.
> 
> Link: https://lkml.kernel.org/r/20230321-kexec_clang16-v7-2-b05c520b7296@chromium.org
> Fixes: 930457057abe ("kernel/kexec_file.c: split up __kexec_load_puragory")
> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
> Cc: <stable@vger.kernel.org>
> Cc: Albert Ou <aou@eecs.berkeley.edu>
> Cc: Baoquan He <bhe@redhat.com>
> Cc: Borislav Petkov (AMD) <bp@alien8.de>
> Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
> Cc: Dave Hansen <dave.hansen@linux.intel.com>
> Cc: Dave Young <dyoung@redhat.com>
> Cc: Eric W. Biederman <ebiederm@xmission.com>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Nathan Chancellor <nathan@kernel.org>
> Cc: Nicholas Piggin <npiggin@gmail.com>
> Cc: Nick Desaulniers <ndesaulniers@google.com>
> Cc: Palmer Dabbelt <palmer@dabbelt.com>
> Cc: Palmer Dabbelt <palmer@rivosinc.com>
> Cc: Paul Walmsley <paul.walmsley@sifive.com>
> Cc: Philipp Rudo <prudo@redhat.com>
> Cc: Ross Zwisler <zwisler@google.com>
> Cc: Simon Horman <horms@kernel.org>
> Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Tom Rix <trix@redhat.com>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> (cherry picked from commit 97b6b9cbba40a21c1d9a344d5c1991f8cfbf136e)
> Signed-off-by: Ricardo Ribalda Delgado <ribalda@chromium.org>
> ---
>  arch/x86/purgatory/Makefile | 5 +++++
>  1 file changed, 5 insertions(+)
> 

Now queued up, thanks.

greg k-h