linux-kernel - [PATCH 4.9 071/171] x86/crash: Add a forward declaration of struct kimage

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Date:   Thu,  2 Jan 2020 23:06:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kbuild test robot <lkp@...el.com>,
        Lianbo Jiang <lijiang@...hat.com>,
        Borislav Petkov <bp@...e.de>, bhe@...hat.com,
        d.hatayama@...itsu.com, dhowells@...hat.com, dyoung@...hat.com,
        ebiederm@...ssion.com, horms@...ge.net.au,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jürgen Gross <jgross@...e.com>,
        kexec@...ts.infradead.org, Thomas Gleixner <tglx@...utronix.de>,
        Tom Lendacky <thomas.lendacky@....com>, vgoyal@...hat.com,
        x86-ml <x86@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 071/171] x86/crash: Add a forward declaration of struct kimage

From: Lianbo Jiang <lijiang@...hat.com>

[ Upstream commit 112eee5d06007dae561f14458bde7f2a4879ef4e ]

Add a forward declaration of struct kimage to the crash.h header because
future changes will invoke a crash-specific function from the realmode
init path and the compiler will complain otherwise like this:

  In file included from arch/x86/realmode/init.c:11:
  ./arch/x86/include/asm/crash.h:5:32: warning: ‘struct kimage’ declared inside\
   parameter list will not be visible outside of this definition or declaration
      5 | int crash_load_segments(struct kimage *image);
        |                                ^~~~~~
  ./arch/x86/include/asm/crash.h:6:37: warning: ‘struct kimage’ declared inside\
   parameter list will not be visible outside of this definition or declaration
      6 | int crash_copy_backup_region(struct kimage *image);
        |                                     ^~~~~~
  ./arch/x86/include/asm/crash.h:7:39: warning: ‘struct kimage’ declared inside\
   parameter list will not be visible outside of this definition or declaration
      7 | int crash_setup_memmap_entries(struct kimage *image,
        |

 [ bp: Rewrite the commit message. ]

Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Lianbo Jiang <lijiang@...hat.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: bhe@...hat.com
Cc: d.hatayama@...itsu.com
Cc: dhowells@...hat.com
Cc: dyoung@...hat.com
Cc: ebiederm@...ssion.com
Cc: horms@...ge.net.au
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Jürgen Gross <jgross@...e.com>
Cc: kexec@...ts.infradead.org
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Tom Lendacky <thomas.lendacky@....com>
Cc: vgoyal@...hat.com
Cc: x86-ml <x86@...nel.org>
Link: https://lkml.kernel.org/r/20191108090027.11082-4-lijiang@redhat.com
Link: https://lkml.kernel.org/r/201910310233.EJRtTMWP%25lkp@intel.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/include/asm/crash.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/asm/crash.h b/arch/x86/include/asm/crash.h
index f498411f2500..1b15304dd098 100644
--- a/arch/x86/include/asm/crash.h
+++ b/arch/x86/include/asm/crash.h
@@ -1,6 +1,8 @@
 #ifndef _ASM_X86_CRASH_H
 #define _ASM_X86_CRASH_H
 
+struct kimage;
+
 int crash_load_segments(struct kimage *image);
 int crash_copy_backup_region(struct kimage *image);
 int crash_setup_memmap_entries(struct kimage *image,
-- 
2.20.1