linux-kernel - Re: [PATCH] KVM: Replace the number of page entries per page with PT64_ENT_PER

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Message-ID: <201603012351.ifGYISai%fengguang.wu@intel.com>
Date:	Tue, 1 Mar 2016 23:22:37 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Lan Tianyu <tianyu.lan@...el.com>
Cc:	kbuild-all@...org, gleb@...nel.org, pbonzini@...hat.com,
	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, Lan Tianyu <tianyu.lan@...el.com>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: Replace the number of page entries per page with
 PT64_ENT_PER_PAGE macro

Hi Lan,

[auto build test ERROR on kvm/linux-next]
[also build test ERROR on v4.5-rc6 next-20160301]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Lan-Tianyu/KVM-Replace-the-number-of-page-entries-per-page-with-PT64_ENT_PER_PAGE-macro/20160301-230910
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: x86_64-randconfig-x013-201609 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/list.h:8:0,
                    from include/linux/preempt.h:10,
                    from include/linux/hardirq.h:4,
                    from include/linux/kvm_host.h:10,
                    from arch/x86/kvm/../../../virt/kvm/kvm_main.c:21:
>> arch/x86/include/asm/kvm_host.h:268:38: error: 'PT64_ENT_PER_PAGE' undeclared here (not in a function)
     DECLARE_BITMAP(unsync_child_bitmap, PT64_ENT_PER_PAGE);
                                         ^
   include/linux/kernel.h:67:30: note: in definition of macro 'DIV_ROUND_UP'
    #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
                                 ^
   include/linux/types.h:10:21: note: in expansion of macro 'BITS_TO_LONGS'
     unsigned long name[BITS_TO_LONGS(bits)]
                        ^
>> arch/x86/include/asm/kvm_host.h:268:2: note: in expansion of macro 'DECLARE_BITMAP'
     DECLARE_BITMAP(unsync_child_bitmap, PT64_ENT_PER_PAGE);
     ^

vim +/PT64_ENT_PER_PAGE +268 arch/x86/include/asm/kvm_host.h

   262		unsigned int unsync_children;
   263		struct kvm_rmap_head parent_ptes; /* rmap pointers to parent sptes */
   264	
   265		/* The page is obsolete if mmu_valid_gen != kvm->arch.mmu_valid_gen.  */
   266		unsigned long mmu_valid_gen;
   267	
 > 268		DECLARE_BITMAP(unsync_child_bitmap, PT64_ENT_PER_PAGE);
   269	
   270	#ifdef CONFIG_X86_32
   271		/*

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Download attachment ".config.gz" of type "application/octet-stream" (24889 bytes)