linux-kernel - Re: [PATCH] x86/boot/32: Convert the 32-bit pgtable setup code from assembly to C

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Date:   Fri, 6 Jan 2017 04:12:41 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kbuild-all@...org, Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org, matt@...eblueprint.co.uk
Subject: Re: [PATCH] x86/boot/32: Convert the 32-bit pgtable setup code from
 assembly to C

Hi Ingo,

[auto build test ERROR on tip/auto-latest]
[also build test ERROR on v4.10-rc2 next-20170105]
[cannot apply to tip/x86/core]
[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/Ingo-Molnar/x86-boot-32-Convert-the-32-bit-pgtable-setup-code-from-assembly-to-C/20170106-035845
config: i386-tinyconfig (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=i386 

All errors (new ones prefixed by >>):

   arch/x86/kernel/head_32.S: Assembler messages:
>> arch/x86/kernel/head_32.S:612: Error: can't resolve `init_thread_union' {*UND* section} - `SIZEOF_PTREGS' {*UND* section}

vim +612 arch/x86/kernel/head_32.S

11d4c3f9 arch/x86/kernel/head_32.S H. Peter Anvin 2011-02-04  606  .balign 4
b32f96c7 arch/x86/kernel/head_32.S Josh Poimboeuf 2016-08-18  607  ENTRY(initial_stack)
22dc3918 arch/x86/kernel/head_32.S Josh Poimboeuf 2016-09-21  608  	/*
22dc3918 arch/x86/kernel/head_32.S Josh Poimboeuf 2016-09-21  609  	 * The SIZEOF_PTREGS gap is a convention which helps the in-kernel
22dc3918 arch/x86/kernel/head_32.S Josh Poimboeuf 2016-09-21  610  	 * unwinder reliably detect the end of the stack.
22dc3918 arch/x86/kernel/head_32.S Josh Poimboeuf 2016-09-21  611  	 */
22dc3918 arch/x86/kernel/head_32.S Josh Poimboeuf 2016-09-21 @612  	.long init_thread_union + THREAD_SIZE - SIZEOF_PTREGS - \
22dc3918 arch/x86/kernel/head_32.S Josh Poimboeuf 2016-09-21  613  	      TOP_OF_KERNEL_STACK_PADDING;
^1da177e arch/i386/kernel/head.S   Linus Torvalds 2005-04-16  614  
4c5023a3 arch/x86/kernel/head_32.S H. Peter Anvin 2012-04-18  615  __INITRODATA

:::::: The code at line 612 was first introduced by commit
:::::: 22dc391865af29a1332bd1d17152f2ca7188bc4a x86/boot: Fix the end of the stack for idle tasks

:::::: TO: Josh Poimboeuf <jpoimboe@...hat.com>
:::::: CC: Ingo Molnar <mingo@...nel.org>

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