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Message-ID: <8dcac250-474a-6102-1a60-b8ad84eb0a4b@bytedance.com>
Date:   Fri, 24 Feb 2023 19:17:27 +0000
From:   Usama Arif <usama.arif@...edance.com>
To:     David Woodhouse <dwmw2@...radead.org>,
        "Michael Kelley (LINUX)" <mikelley@...rosoft.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "kim.phillips@....com" <kim.phillips@....com>,
        "brgerst@...il.com" <brgerst@...il.com>
Cc:     "piotrgorski@...hyos.org" <piotrgorski@...hyos.org>,
        "oleksandr@...alenko.name" <oleksandr@...alenko.name>,
        "arjan@...ux.intel.com" <arjan@...ux.intel.com>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "hpa@...or.com" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "paulmck@...nel.org" <paulmck@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "rcu@...r.kernel.org" <rcu@...r.kernel.org>,
        "mimoja@...oja.de" <mimoja@...oja.de>,
        "hewenliang4@...wei.com" <hewenliang4@...wei.com>,
        "thomas.lendacky@....com" <thomas.lendacky@....com>,
        "seanjc@...gle.com" <seanjc@...gle.com>,
        "pmenzel@...gen.mpg.de" <pmenzel@...gen.mpg.de>,
        "fam.zheng@...edance.com" <fam.zheng@...edance.com>,
        "punit.agrawal@...edance.com" <punit.agrawal@...edance.com>,
        "simon.evans@...edance.com" <simon.evans@...edance.com>,
        "liangma@...ngbit.com" <liangma@...ngbit.com>
Subject: Re: [External] Re: [PATCH v11 09/12] x86/smpboot: Remove
 initial_stack on 64-bit



On 24/02/2023 18:28, David Woodhouse wrote:
> On Fri, 2023-02-24 at 18:24 +0000, Michael Kelley (LINUX) wrote:
>> I'm getting a compile error on the new reference to PTREGS_SIZE:
> 
> Is it just that <asm/asm-offsets.h> is included conditionally, and not
> in your build? What if you include it directly from <asm/processor.h>

This is fixed in the v2 patch that Brian sent.

diff --git a/arch/x86/include/asm/processor.h 
b/arch/x86/include/asm/processor.h
index 9c4a5c4d46c1..bdde7316e75b 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -650,8 +650,8 @@ static inline void spin_lock_prefetch(const void *x)
  #else
  extern unsigned long __end_init_task[];

-#define INIT_THREAD {                                                  \
-       .sp     = (unsigned long)&__end_init_task - PTREGS_SIZE,        \
+#define INIT_THREAD { 
    \
+       .sp     = (unsigned long)&__end_init_task - sizeof(struct 
pt_regs), \
  }

  extern unsigned long KSTK_ESP(struct task_struct *task);

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