Re: [PATCH v4 1/4] x86/mm: Adapt MODULES_END based on Fixmap section size

From: Thomas Garnier <thgarnie@google.com>
To: kbuild test robot <lkp@intel.com>
Cc: linux-efi@vger.kernel.org,
	"Stanislaw Gruszka" <sgruszka@redhat.com>,
	linux-doc@vger.kernel.org, "kvm list" <kvm@vger.kernel.org>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Matt Fleming" <matt@codeblueprint.co.uk>,
	"Dave Hansen" <dave.hansen@intel.com>,
	"Pavel Machek" <pavel@ucw.cz>, "H . Peter Anvin" <hpa@zytor.com>,
	"Kernel Hardening" <kernel-hardening@lists.openwall.com>,
	"Jiri Olsa" <jolsa@redhat.com>,
	"Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
	"Andi Kleen" <ak@linux.intel.com>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	"Joerg Roedel" <joro@8bytes.org>,
	"the arch/x86 maintainers" <x86@kernel.org>,
	"Paul Gortmaker" <paul.gortmaker@windriver.com>,
	"Christian Borntraeger" <borntraeger@de.ibm.com>,
	"Ingo Molnar" <mingo@redhat.com>,
	xen-devel@lists.xenproject.org, "Borislav Petkov" <bp@suse.de>,
	"Len Brown" <len.brown@intel.com>, "Jiri Kosina" <jikos@kerne>
Subject: Re: [PATCH v4 1/4] x86/mm: Adapt MODULES_END based on Fixmap section size
Date: Fri, 17 Feb 2017 08:00:19 -0800	[thread overview]
Message-ID: <CAJcbSZH7nyLuSmE2imEdk-VzwZcLw4P9T3jZEE2EiRUVPEbL1g__33512.596859555$1487347287$gmane$org@mail.gmail.com> (raw)
In-Reply-To: <201702170838.cW5onrBk%fengguang.wu@intel.com>

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I will send an update patch on this thread to fix the fixmap dependencies.

On Thu, Feb 16, 2017 at 4:45 PM, kbuild test robot <lkp@intel.com> wrote:

> Hi Thomas,
>
> [auto build test ERROR on next-20170216]
> [also build test ERROR on v4.10-rc8]
> [cannot apply to tip/x86/core kvm/linux-next tip/auto-latest v4.9-rc8
> v4.9-rc7 v4.9-rc6]
> [if your patch is applied to the wrong git tree, please drop us a note to
> help improve the system]
>
> url:    https://github.com/0day-ci/linux/commits/Thomas-Garnier/
> x86-mm-Adapt-MODULES_END-based-on-Fixmap-section-size/20170217-072759
> config: x86_64-randconfig-s4-02170325 (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=x86_64
>
> All errors (new ones prefixed by >>):
>
>    In file included from arch/x86/include/asm/pgtable_types.h:240:0,
>                     from arch/x86/include/asm/paravirt_types.h:44,
>                     from arch/x86/include/asm/ptrace.h:71,
>                     from arch/x86/include/asm/math_emu.h:4,
>                     from arch/x86/include/asm/processor.h:11,
>                     from arch/x86/include/asm/cpufeature.h:4,
>                     from arch/x86/include/asm/thread_info.h:52,
>                     from include/linux/thread_info.h:25,
>                     from arch/x86/include/asm/preempt.h:6,
>                     from include/linux/preempt.h:59,
>                     from include/linux/spinlock.h:50,
>                     from include/linux/wait.h:8,
>                     from include/linux/fs.h:5,
>                     from include/linux/debugfs.h:18,
>                     from arch/x86/mm/dump_pagetables.c:15:
> >> arch/x86/include/asm/pgtable_64_types.h:71:23: error: implicit
> declaration of function '__fix_to_virt' [-Werror=implicit-function-
> declaration]
>     #define MODULES_END   __fix_to_virt(__end_of_fixed_addresses + 1)
>                           ^
>    arch/x86/mm/dump_pagetables.c:87:4: note: in expansion of macro
> 'MODULES_END'
>      { MODULES_END,          "End Modules" },
>        ^~~~~~~~~~~
>    arch/x86/include/asm/pgtable_64_types.h:71:37: error:
> '__end_of_fixed_addresses' undeclared here (not in a function)
>     #define MODULES_END   __fix_to_virt(__end_of_fixed_addresses + 1)
>                                         ^
>    arch/x86/mm/dump_pagetables.c:87:4: note: in expansion of macro
> 'MODULES_END'
>      { MODULES_END,          "End Modules" },
>        ^~~~~~~~~~~
>    cc1: some warnings being treated as errors
>
> vim +/__fix_to_virt +71 arch/x86/include/asm/pgtable_64_types.h
>
>     65  #define VMALLOC_START   __VMALLOC_BASE
>     66  #define VMEMMAP_START   __VMEMMAP_BASE
>     67  #endif /* CONFIG_RANDOMIZE_MEMORY */
>     68  #define VMALLOC_END     (VMALLOC_START + _AC((VMALLOC_SIZE_TB <<
> 40) - 1, UL))
>     69  #define MODULES_VADDR    (__START_KERNEL_map + KERNEL_IMAGE_SIZE)
>     70  /* The module sections ends with the start of the fixmap */
>   > 71  #define MODULES_END   __fix_to_virt(__end_of_fixed_addresses + 1)
>     72  #define MODULES_LEN   (MODULES_END - MODULES_VADDR)
>     73  #define ESPFIX_PGD_ENTRY _AC(-2, UL)
>     74  #define ESPFIX_BASE_ADDR (ESPFIX_PGD_ENTRY << PGDIR_SHIFT)
>
> ---
> 0-DAY kernel test infrastructure                Open Source Technology
> Center
> https://lists.01.org/pipermail/kbuild-all                   Intel
> Corporation
>

-- 
Thomas

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