Re: [PATCH 3/5] mm: remove MPX hooks from generic code

From: kbuild test robot
Date: Fri Jan 04 2019 - 17:34:20 EST

Hi Dave,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.20 next-20190103]
[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/Dave-Hansen/x86-mpx-remove-MPX-APIs/20190105-051028
config: i386-tinyconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

Note: the linux-review/Dave-Hansen/x86-mpx-remove-MPX-APIs/20190105-051028 HEAD 34ce15ccc190201bc8c062e1559df2c1864902ef builds fine.
It only hurts bisectibility.

All errors (new ones prefixed by >>):

arch/x86/kernel/setup.c: In function 'setup_arch':
>> arch/x86/kernel/setup.c:927:2: error: implicit declaration of function 'mpx_mm_init'; did you mean 'mem_init'? [-Werror=implicit-function-declaration]
mpx_mm_init(&init_mm);
^~~~~~~~~~~
mem_init
cc1: some warnings being treated as errors

vim +927 arch/x86/kernel/setup.c

7465252ea arch/x86/kernel/setup_32.c Yinghai Lu 2008-06-23 911
42bbdb43b arch/x86/kernel/setup.c Thomas Gleixner 2009-08-20 912 x86_init.oem.arch_setup();
2215e69d2 arch/x86/kernel/setup_32.c Huang, Ying 2008-01-30 913
419afdf53 arch/x86/kernel/setup.c Bjorn Helgaas 2010-10-26 914 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
103e20630 arch/x86/kernel/setup.c Ingo Molnar 2017-01-28 915 e820__memory_setup();
28bb22379 arch/x86/kernel/setup.c Yinghai Lu 2008-06-30 916 parse_setup_data();
28bb22379 arch/x86/kernel/setup.c Yinghai Lu 2008-06-30 917
^1da177e4 arch/i386/kernel/setup.c Linus Torvalds 2005-04-16 918 copy_edd();
^1da177e4 arch/i386/kernel/setup.c Linus Torvalds 2005-04-16 919
30c826451 arch/x86/kernel/setup_32.c H. Peter Anvin 2007-10-15 920 if (!boot_params.hdr.root_flags)
^1da177e4 arch/i386/kernel/setup.c Linus Torvalds 2005-04-16 921 root_mountflags &= ~MS_RDONLY;
^1da177e4 arch/i386/kernel/setup.c Linus Torvalds 2005-04-16 922 init_mm.start_code = (unsigned long) _text;
^1da177e4 arch/i386/kernel/setup.c Linus Torvalds 2005-04-16 923 init_mm.end_code = (unsigned long) _etext;
^1da177e4 arch/i386/kernel/setup.c Linus Torvalds 2005-04-16 924 init_mm.end_data = (unsigned long) _edata;
93dbda7cb arch/x86/kernel/setup.c Jeremy Fitzhardinge 2009-02-26 925 init_mm.brk = _brk_end;
fe3d197f8 arch/x86/kernel/setup.c Dave Hansen 2014-11-14 926
fe3d197f8 arch/x86/kernel/setup.c Dave Hansen 2014-11-14 @927 mpx_mm_init(&init_mm);
^1da177e4 arch/i386/kernel/setup.c Linus Torvalds 2005-04-16 928
4046d6e81 arch/x86/kernel/setup.c Linus Torvalds 2016-04-14 929 code_resource.start = __pa_symbol(_text);
4046d6e81 arch/x86/kernel/setup.c Linus Torvalds 2016-04-14 930 code_resource.end = __pa_symbol(_etext)-1;
4046d6e81 arch/x86/kernel/setup.c Linus Torvalds 2016-04-14 931 data_resource.start = __pa_symbol(_etext);
4046d6e81 arch/x86/kernel/setup.c Linus Torvalds 2016-04-14 932 data_resource.end = __pa_symbol(_edata)-1;
4046d6e81 arch/x86/kernel/setup.c Linus Torvalds 2016-04-14 933 bss_resource.start = __pa_symbol(__bss_start);
4046d6e81 arch/x86/kernel/setup.c Linus Torvalds 2016-04-14 934 bss_resource.end = __pa_symbol(__bss_stop)-1;
4046d6e81 arch/x86/kernel/setup.c Linus Torvalds 2016-04-14 935

:::::: The code at line 927 was first introduced by commit
:::::: fe3d197f84319d3bce379a9c0dc17b1f48ad358c x86, mpx: On-demand kernel allocation of bounds tables

:::::: TO: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
:::::: CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

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

Attachment: .config.gz
Description: application/gzip