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Message-ID: <201803010737.ZyGCouzm%fengguang.wu@intel.com>
Date:   Thu, 1 Mar 2018 07:33:47 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Dou Liyang <douly.fnst@...fujitsu.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        tipbuild@...or.com, Thomas Gleixner <tglx@...utronix.de>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [tip:x86/apic 1/2] arch/x86/kernel/apic/apic.c:1507:2: error: 'i'
 undeclared; did you mean 'if'?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/apic
head:   ea5dfef5a890c9e6e47bdddfc23c4a4ba0c1bea1
commit: 2066f4d67e7d9cbe44e451d782cdcc0a0d12e5d3 [1/2] x86/apic: Move pending intr check code into it's own function
config: i386-randconfig-x007-201808 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout 2066f4d67e7d9cbe44e451d782cdcc0a0d12e5d3
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   arch/x86/kernel/apic/apic.c: In function 'setup_local_APIC':
>> arch/x86/kernel/apic/apic.c:1507:2: error: 'i' undeclared (first use in this function); did you mean 'if'?
     i = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
     ^
     if
   arch/x86/kernel/apic/apic.c:1507:2: note: each undeclared identifier is reported only once for each function it appears in

vim +1507 arch/x86/kernel/apic/apic.c

2066f4d6 arch/x86/kernel/apic/apic.c Dou Liyang         2018-02-26  1460  
0e078e2f arch/x86/kernel/apic_64.c   Thomas Gleixner    2008-01-30  1461  /**
0e078e2f arch/x86/kernel/apic_64.c   Thomas Gleixner    2008-01-30  1462   * setup_local_APIC - setup the local APIC
0aa002fe arch/x86/kernel/apic/apic.c Tejun Heo          2010-12-09  1463   *
543113d2 arch/x86/kernel/apic/apic.c Dou Liyang         2017-02-07  1464   * Used to setup local APIC while initializing BSP or bringing up APs.
0aa002fe arch/x86/kernel/apic/apic.c Tejun Heo          2010-12-09  1465   * Always called with preemption disabled.
0e078e2f arch/x86/kernel/apic_64.c   Thomas Gleixner    2008-01-30  1466   */
b753a2b7 arch/x86/kernel/apic/apic.c Dou Liyang         2018-02-14  1467  static void setup_local_APIC(void)
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1468  {
0aa002fe arch/x86/kernel/apic/apic.c Tejun Heo          2010-12-09  1469  	int cpu = smp_processor_id();
2066f4d6 arch/x86/kernel/apic/apic.c Dou Liyang         2018-02-26  1470  	unsigned int value;
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1471  
f1182638 arch/x86/kernel/apic.c      Jan Beulich        2009-01-14  1472  	if (disable_apic) {
7167d08e arch/x86/kernel/apic/apic.c Henrik Kretzschmar 2011-02-22  1473  		disable_ioapic_support();
f1182638 arch/x86/kernel/apic.c      Jan Beulich        2009-01-14  1474  		return;
f1182638 arch/x86/kernel/apic.c      Jan Beulich        2009-01-14  1475  	}
f1182638 arch/x86/kernel/apic.c      Jan Beulich        2009-01-14  1476  
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1477  #ifdef CONFIG_X86_32
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1478  	/* Pound the ESR really hard over the head with a big hammer - mbligh */
08125d3e arch/x86/kernel/apic.c      Ingo Molnar        2009-01-28  1479  	if (lapic_is_integrated() && apic->disable_esr) {
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1480  		apic_write(APIC_ESR, 0);
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1481  		apic_write(APIC_ESR, 0);
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1482  		apic_write(APIC_ESR, 0);
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1483  		apic_write(APIC_ESR, 0);
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1484  	}
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1485  #endif
cdd6c482 arch/x86/kernel/apic/apic.c Ingo Molnar        2009-09-21  1486  	perf_events_lapic_init();
89c38c28 arch/x86/kernel/apic_64.c   Cyrill Gorcunov    2008-08-24  1487  
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1488  	/*
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1489  	 * Double-check whether this APIC is really registered.
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1490  	 * This is meaningless in clustered apic mode, so we skip it.
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1491  	 */
c2777f98 arch/x86/kernel/apic/apic.c Daniel Walker      2009-09-12  1492  	BUG_ON(!apic->apic_id_registered());
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1493  
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1494  	/*
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1495  	 * Intel recommends to set DFR, LDR and TPR before enabling
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1496  	 * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1497  	 * document number 292116).  So here it goes...
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1498  	 */
a5c43296 arch/x86/kernel/apic.c      Ingo Molnar        2009-01-28  1499  	apic->init_apic_ldr();
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1500  
6f802c4b arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1501  #ifdef CONFIG_X86_32
6f802c4b arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1502  	/*
acb8bc09 arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1503  	 * APIC LDR is initialized.  If logical_apicid mapping was
acb8bc09 arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1504  	 * initialized during get_smp_config(), make sure it matches the
acb8bc09 arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1505  	 * actual value.
6f802c4b arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1506  	 */
acb8bc09 arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23 @1507  	i = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
acb8bc09 arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1508  	WARN_ON(i != BAD_APICID && i != logical_smp_processor_id());
acb8bc09 arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1509  	/* always use the value from LDR */
6f802c4b arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1510  	early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
6f802c4b arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1511  		logical_smp_processor_id();
6f802c4b arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1512  #endif
6f802c4b arch/x86/kernel/apic/apic.c Tejun Heo          2011-01-23  1513  
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1514  	/*
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1515  	 * Set Task Priority to 'accept all'. We never change this
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1516  	 * later on.
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1517  	 */
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1518  	value = apic_read(APIC_TASKPRI);
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1519  	value &= ~APIC_TPRI_MASK;
11a8e778 arch/x86_64/kernel/apic.c   Andi Kleen         2006-01-11  1520  	apic_write(APIC_TASKPRI, value);
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1521  
2066f4d6 arch/x86/kernel/apic/apic.c Dou Liyang         2018-02-26  1522  	apic_pending_intr_clear();
da7ed9f9 arch/x86_64/kernel/apic.c   Vivek Goyal        2006-03-25  1523  
da7ed9f9 arch/x86_64/kernel/apic.c   Vivek Goyal        2006-03-25  1524  	/*
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1525  	 * Now that we are all set up, enable the APIC
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1526  	 */
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1527  	value = apic_read(APIC_SPIV);
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1528  	value &= ~APIC_VECTOR_MASK;
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1529  	/*
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1530  	 * Enable APIC
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1531  	 */
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1532  	value |= APIC_SPIV_APIC_ENABLED;
^1da177e arch/x86_64/kernel/apic.c   Linus Torvalds     2005-04-16  1533  

:::::: The code at line 1507 was first introduced by commit
:::::: acb8bc09c6185e4d3d582d0076aaa6a89f19d8c5 x86: Add apic->x86_32_early_logical_apicid()

:::::: TO: Tejun Heo <tj@...nel.org>
:::::: CC: Ingo Molnar <mingo@...e.hu>

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

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