linux-kernel - Re: [PATCHv2 3/5] x86/mm: fix native mmap() in compat bins and vice-versa

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Message-ID: <201701162155.pVMKdWgq%fengguang.wu@intel.com>
Date:   Mon, 16 Jan 2017 21:31:10 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Dmitry Safonov <dsafonov@...tuozzo.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        0x7f454c46@...il.com, Dmitry Safonov <dsafonov@...tuozzo.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...e.de>, x86@...nel.org,
        linux-mm@...ck.org
Subject: Re: [PATCHv2 3/5] x86/mm: fix native mmap() in compat bins and
 vice-versa

Hi Dmitry,

[auto build test ERROR on tip/x86/core]
[also build test ERROR on v4.10-rc4 next-20170116]
[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/Dmitry-Safonov/Fix-compatible-mmap-return-pointer-over-4Gb/20170116-204523
config: x86_64-randconfig-x001-201703 (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 >>):

   arch/x86/kernel/sys_x86_64.c: In function 'find_start_end':
>> arch/x86/kernel/sys_x86_64.c:122:7: error: implicit declaration of function 'in_compat_syscall' [-Werror=implicit-function-declaration]
      if (in_compat_syscall()) {
          ^~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/in_compat_syscall +122 arch/x86/kernel/sys_x86_64.c

   116			return;
   117		}
   118	
   119		if (!test_thread_flag(TIF_ADDR32)) {
   120	#ifdef CONFIG_COMPAT
   121			/* 64-bit native binary doing compat 32-bit syscall */
 > 122			if (in_compat_syscall()) {
   123				*begin = mmap_legacy_base(arch_compat_rnd(),
   124							IA32_PAGE_OFFSET);
   125				*end = IA32_PAGE_OFFSET;

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

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