linux-kernel - [PATCH] x86/debug: Include percpu.h in debugreg.h to get DECLARE_PER

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Date:   Thu, 10 Nov 2022 20:17:07 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     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
Cc:     "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
        Sean Christopherson <seanjc@...gle.com>
Subject: [PATCH] x86/debug: Include percpu.h in debugreg.h to get
 DECLARE_PER_CPU() et al

Include percpu.h to pick up the definition of DECLARE_PER_CPU() and
friends instead of relying on the parent to provide the #include.  E.g.
swapping the order of includes in arch/x86/kvm/vmx/nested.c (simulating
KVM code movement being done for other purposes) results in build errors:

  In file included from arch/x86/kvm/vmx/nested.c:3:
  arch/x86/include/asm/debugreg.h:9:32: error: unknown type name ‘cpu_dr7’
      9 | DECLARE_PER_CPU(unsigned long, cpu_dr7);
        |                                ^~~~~~~

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/include/asm/debugreg.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h
index cfdf307ddc01..b049d950612f 100644
--- a/arch/x86/include/asm/debugreg.h
+++ b/arch/x86/include/asm/debugreg.h
@@ -2,8 +2,8 @@
 #ifndef _ASM_X86_DEBUGREG_H
 #define _ASM_X86_DEBUGREG_H
 
-
 #include <linux/bug.h>
+#include <linux/percpu.h>
 #include <uapi/asm/debugreg.h>
 
 DECLARE_PER_CPU(unsigned long, cpu_dr7);

base-commit: 7420ae3bb977b46eab082f4964641f3ddc98ebaf
-- 
2.38.1.431.g37b22c650d-goog