linux-kernel - [PATCH v1 1/1] s390/protvirt: fix compilation issue

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Message-Id: <20200423120114.2027410-1-imbrenda@linux.ibm.com>
Date:   Thu, 23 Apr 2020 14:01:14 +0200
From:   Claudio Imbrenda <imbrenda@...ux.ibm.com>
To:     kvm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        borntraeger@...ibm.com, frankja@...ux.ibm.com, gor@...ux.ibm.com,
        cohuck@...hat.com, david@...hat.com,
        kbuild test robot <lkp@...el.com>,
        Philipp Rudo <prudo@...ux.ibm.com>
Subject: [PATCH v1 1/1] s390/protvirt: fix compilation issue

The kernel fails to compile with CONFIG_PROTECTED_VIRTUALIZATION_GUEST
set but CONFIG_KVM unset.

This patch fixes the issue by making the needed variable always available.

Fixes: a0f60f8431999bf5 ("s390/protvirt: Add sysfs firmware interface for Ultravisor information")
Reported-by: kbuild test robot <lkp@...el.com>
Reported-by: Philipp Rudo <prudo@...ux.ibm.com>
Suggested-by: Philipp Rudo <prudo@...ux.ibm.com>
CC: Vasily Gorbik <gor@...ux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@...ux.ibm.com>
---
 arch/s390/boot/uv.c   | 2 --
 arch/s390/kernel/uv.c | 3 ++-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c
index 8fde561f1d07..f887a479cdc7 100644
--- a/arch/s390/boot/uv.c
+++ b/arch/s390/boot/uv.c
@@ -7,9 +7,7 @@
 #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
 int __bootdata_preserved(prot_virt_guest);
 #endif
-#if IS_ENABLED(CONFIG_KVM)
 struct uv_info __bootdata_preserved(uv_info);
-#endif
 
 void uv_query_info(void)
 {
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c
index c86d654351d1..4c0677fc8904 100644
--- a/arch/s390/kernel/uv.c
+++ b/arch/s390/kernel/uv.c
@@ -23,10 +23,11 @@
 int __bootdata_preserved(prot_virt_guest);
 #endif
 
+struct uv_info __bootdata_preserved(uv_info);
+
 #if IS_ENABLED(CONFIG_KVM)
 int prot_virt_host;
 EXPORT_SYMBOL(prot_virt_host);
-struct uv_info __bootdata_preserved(uv_info);
 EXPORT_SYMBOL(uv_info);
 
 static int __init prot_virt_setup(char *val)
-- 
2.25.3