linux-kernel - [rcu:rcu/urgent 11/11] include/linux/srcu.h:66:2: error: #error "Unknown SRCU implementation specified to kernel configuration"

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Date:   Mon, 24 Apr 2017 03:00:38 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: [rcu:rcu/urgent 11/11] include/linux/srcu.h:66:2: error: #error
 "Unknown SRCU implementation specified to kernel configuration"

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/urgent
head:   746ec1f689abc74dca72fdce4134decdbfaec295
commit: 746ec1f689abc74dca72fdce4134decdbfaec295 [11/11] srcu: Fix Kconfig botch when SRCU not selected
config: sparc64-allnoconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 746ec1f689abc74dca72fdce4134decdbfaec295
        # save the attached .config to linux build tree
        make.cross ARCH=sparc64 

All errors (new ones prefixed by >>):

   In file included from include/linux/notifier.h:15:0,
                    from include/linux/pm_qos.h:8,
                    from kernel/power/qos.c:32:
>> include/linux/srcu.h:66:2: error: #error "Unknown SRCU implementation specified to kernel configuration"
    #error "Unknown SRCU implementation specified to kernel configuration"
     ^~~~~
   In file included from include/linux/pm_qos.h:8:0,
                    from kernel/power/qos.c:32:
>> include/linux/notifier.h:77:21: error: field 'srcu' has incomplete type
     struct srcu_struct srcu;
                        ^~~~

vim +66 include/linux/srcu.h

632ee2001 Paul E. McKenney 2010-02-22  50  
55c6659af Lai Jiangshan    2012-10-13  51  #define __SRCU_DEP_MAP_INIT(srcu_name)	.dep_map = { .name = #srcu_name },
632ee2001 Paul E. McKenney 2010-02-22  52  #else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
632ee2001 Paul E. McKenney 2010-02-22  53  
e6a92013b Alan Stern       2006-10-04  54  int init_srcu_struct(struct srcu_struct *sp);
632ee2001 Paul E. McKenney 2010-02-22  55  
55c6659af Lai Jiangshan    2012-10-13  56  #define __SRCU_DEP_MAP_INIT(srcu_name)
632ee2001 Paul E. McKenney 2010-02-22  57  #endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */
632ee2001 Paul E. McKenney 2010-02-22  58  
d8be81735 Paul E. McKenney 2017-03-25  59  #ifdef CONFIG_TINY_SRCU
d8be81735 Paul E. McKenney 2017-03-25  60  #include <linux/srcutiny.h>
d8be81735 Paul E. McKenney 2017-03-25  61  #elif defined(CONFIG_TREE_SRCU)
d8be81735 Paul E. McKenney 2017-03-25  62  #include <linux/srcutree.h>
dad81a202 Paul E. McKenney 2017-03-25  63  #elif defined(CONFIG_CLASSIC_SRCU)
dad81a202 Paul E. McKenney 2017-03-25  64  #include <linux/srcuclassic.h>
d8be81735 Paul E. McKenney 2017-03-25  65  #else
d8be81735 Paul E. McKenney 2017-03-25 @66  #error "Unknown SRCU implementation specified to kernel configuration"
d8be81735 Paul E. McKenney 2017-03-25  67  #endif
55c6659af Lai Jiangshan    2012-10-13  68  
931ea9d1a Lai Jiangshan    2012-03-19  69  /**
931ea9d1a Lai Jiangshan    2012-03-19  70   * call_srcu() - Queue a callback for invocation after an SRCU grace period
931ea9d1a Lai Jiangshan    2012-03-19  71   * @sp: srcu_struct in queue the callback
931ea9d1a Lai Jiangshan    2012-03-19  72   * @head: structure to be used for queueing the SRCU callback.
931ea9d1a Lai Jiangshan    2012-03-19  73   * @func: function to be invoked after the SRCU grace period
931ea9d1a Lai Jiangshan    2012-03-19  74   *

:::::: The code at line 66 was first introduced by commit
:::::: d8be81735aa89413b333de488251f0e64e2be591 srcu: Create a tiny SRCU

:::::: TO: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
:::::: CC: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

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