linux-kernel - Re: [PATCH 7/7] arm: Add livepatch necessary arch selects into Kconfig

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Date:   Wed, 7 Dec 2016 14:48:33 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Abel Vesa <abelvesa@...ux.com>
Cc:     kbuild-all@...org, linux@...linux.org.uk, jpoimboe@...hat.com,
        jeyu@...hat.com, jikos@...nel.org, mbenes@...e.cz,
        pmladek@...e.com, rostedt@...dmis.org, mingo@...hat.com,
        gregkh@...uxfoundation.org, geert+renesas@...der.be,
        davem@...emloft.net, akpm@...ux-foundation.org,
        emil.l.velikov@...il.com, mchehab@...nel.org, linux@...ck-us.net,
        ard.biesheuvel@...aro.org, jens.wiklander@...aro.org,
        jean-philippe.brucker@....com, viro@...iv.linux.org.uk,
        stefano.stabellini@...citrix.com, chris.brandt@...esas.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        live-patching@...r.kernel.org, Abel Vesa <abelvesa@...ux.com>
Subject: Re: [PATCH 7/7] arm: Add livepatch necessary arch selects into
 Kconfig

Hi Abel,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.9-rc8 next-20161206]
[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/Abel-Vesa/arm-Add-livepatch-support/20161207-074210
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All warnings (new ones prefixed by >>):

   arch/arm/kernel/entry-ftrace.S: Assembler messages:
>> arch/arm/kernel/entry-ftrace.S:259: Warning: if writeback register is in list, it must be the lowest reg in the list
>> arch/arm/kernel/entry-ftrace.S:259: Warning: writeback of base register when in register list is UNPREDICTABLE

vim +259 arch/arm/kernel/entry-ftrace.S

82112379 Russell King 2014-10-28  243  #else
82112379 Russell King 2014-10-28  244  	__mcount
82112379 Russell King 2014-10-28  245  #endif
82112379 Russell King 2014-10-28  246  UNWIND(.fnend)
82112379 Russell King 2014-10-28  247  ENDPROC(__gnu_mcount_nc)
82112379 Russell King 2014-10-28  248  
82112379 Russell King 2014-10-28  249  #ifdef CONFIG_DYNAMIC_FTRACE
82112379 Russell King 2014-10-28  250  ENTRY(ftrace_caller)
82112379 Russell King 2014-10-28  251  UNWIND(.fnstart)
82112379 Russell King 2014-10-28  252  	__ftrace_caller
82112379 Russell King 2014-10-28  253  UNWIND(.fnend)
82112379 Russell King 2014-10-28  254  ENDPROC(ftrace_caller)
22cc202f Abel Vesa    2016-12-06  255  
22cc202f Abel Vesa    2016-12-06  256  #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
22cc202f Abel Vesa    2016-12-06  257  ENTRY(ftrace_regs_caller)
22cc202f Abel Vesa    2016-12-06  258  UNWIND(.fnstart)
22cc202f Abel Vesa    2016-12-06 @259  	__ftrace_regs_caller
22cc202f Abel Vesa    2016-12-06  260  UNWIND(.fnend)
22cc202f Abel Vesa    2016-12-06  261  ENDPROC(ftrace_regs_caller)
22cc202f Abel Vesa    2016-12-06  262  #endif
22cc202f Abel Vesa    2016-12-06  263  
82112379 Russell King 2014-10-28  264  #endif
82112379 Russell King 2014-10-28  265  
82112379 Russell King 2014-10-28  266  #ifdef CONFIG_FUNCTION_GRAPH_TRACER
82112379 Russell King 2014-10-28  267  ENTRY(ftrace_graph_caller)

:::::: The code at line 259 was first introduced by commit
:::::: 22cc202f6f168f6987ec2441a19ce1601a296a4e arm: Add ftrace with regs support

:::::: TO: Abel Vesa <abelvesa@...ux.com>
:::::: CC: 0day robot <fengguang.wu@...el.com>

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