Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1296986

[PATCH] x86/vdso: Fix build when CONFIG_KVM_GUEST is not set

Show all headers | View raw

From: Borislav Petkov <bp@suse.de>

Doing randbuilds fails like this here at link time:

  arch/x86/built-in.o: In function `arch_setup_additional_pages':
  /home/boris/kernel/linux/arch/x86/entry/vdso/vma.c:174: undefined reference to `pvclock_pvti_cpu0_va'
  make: *** [vmlinux] Error 1

This is because pvclock_pvti_cpu0_va() is defined in
arch/x86/kernel/kvmclock.c as an accessor to the private hv_clock thing
but if CONFIG_KVM_GUEST is not set, we don't have that function to link
to.

So add CONFIG_KVM_GUEST to the ifdeffery.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/include/asm/pvclock.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvclock.h
index 66df22b2e0c9..1af6bee77fb0 100644
--- a/arch/x86/include/asm/pvclock.h
+++ b/arch/x86/include/asm/pvclock.h
@@ -4,7 +4,7 @@
 #include <linux/clocksource.h>
 #include <asm/pvclock-abi.h>
 
-#ifdef CONFIG_PARAVIRT_CLOCK
+#if defined(CONFIG_PARAVIRT_CLOCK) && defined(CONFIG_KVM_GUEST)
 extern struct pvclock_vsyscall_time_info *pvclock_pvti_cpu0_va(void);
 #else
 static inline struct pvclock_vsyscall_time_info *pvclock_pvti_cpu0_va(void)
-- 
2.3.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH] x86/vdso: Fix build when CONFIG_KVM_GUEST is not set Borislav Petkov <bp@alien8.de> - 2015-12-22 20:00 +0100
  Re: [PATCH] x86/vdso: Fix build when CONFIG_KVM_GUEST is not set Borislav Petkov <bp@alien8.de> - 2015-12-23 11:40 +0100

csiph-web