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

---
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https://lists.01.org/pipermail/kbuild-all Intel Corporation
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