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SubjectRe: arch/x86/xen/suspend.c:70:9: error: implicit declaration of function 'xen_pv_domain'
On Mon, 21 Dec 2015 00:43:17 +0800 kbuild test robot <fengguang.wu@intel.com> wrote:

> First bad commit (maybe != root cause):
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 69c37a92ddbf79d9672230f21a04580d7ac2f4c3
> commit: 71458cfc782eafe4b27656e078d379a34e472adf kernel: add support for gcc 5
> date: 1 year, 2 months ago
> config: x86_64-randconfig-x006-201551 (attached as .config)
> reproduce:
> git checkout 71458cfc782eafe4b27656e078d379a34e472adf
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> All errors (new ones prefixed by >>):
>
> arch/x86/xen/suspend.c: In function 'xen_arch_pre_suspend':
> >> arch/x86/xen/suspend.c:70:9: error: implicit declaration of function 'xen_pv_domain' [-Werror=implicit-function-declaration]
> if (xen_pv_domain())
> ^

hm, tricky!

--- a/arch/x86/xen/suspend.c~arch-x86-xen-suspendc-include-xen-xenh
+++ a/arch/x86/xen/suspend.c
@@ -1,6 +1,7 @@
#include <linux/types.h>
#include <linux/tick.h>

+#include <xen/xen.h>
#include <xen/interface/xen.h>
#include <xen/grant_table.h>
#include <xen/events.h>
_


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