Hi Frederic,

FYI, kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/idle
head:   dea42dc2282b9c8f78eb1fb6c4a0c81d700dd31c
commit: f105e7d73a465c74f00d554c855a3ddfdb7fa4ae [2/27] rcu: New rcu_user_enter_irq() and rcu_user_exit_irq() APIs
config: i386-randconfig-m011 (attached as .config)

All related error/warning messages:

In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:969:2: error: #endif without #if
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:201:20: error: static declaration of 'rcu_user_enter' follows non-static declaration
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:194:13: note: previous declaration of 'rcu_user_enter' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:202:20: error: static declaration of 'rcu_user_exit' follows non-static declaration
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:195:13: note: previous declaration of 'rcu_user_exit' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:262:20: error: redefinition of 'init_rcu_head_on_stack'
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:262:20: note: previous definition of 'init_rcu_head_on_stack' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:266:20: error: redefinition of 'destroy_rcu_head_on_stack'
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:266:20: note: previous definition of 'destroy_rcu_head_on_stack' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:278:20: error: redefinition of 'rcu_lockdep_current_cpu_online'
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:278:20: note: previous definition of 'rcu_lockdep_current_cpu_online' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:286:20: error: redefinition of 'rcu_lock_acquire'
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:286:20: note: previous definition of 'rcu_lock_acquire' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:291:20: error: redefinition of 'rcu_lock_release'
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:291:20: note: previous definition of 'rcu_lock_release' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:321:19: error: redefinition of 'rcu_read_lock_held'
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:321:19: note: previous definition of 'rcu_read_lock_held' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:370:19: error: redefinition of 'rcu_read_lock_sched_held'
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/rcupdate.h:370:19: note: previous definition of 'rcu_read_lock_sched_held' was here
In file included from include/linux/sem.h:81:0,
                 from include/linux/sched.h:71,
                 from arch/x86/kernel/asm-offsets.c:9:
include/linux/rcupdate.h:731:20: error: redefinition of 'rcu_read_lock'
In file included from include/linux/srcu.h:31:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:730,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:

vim +969 include/linux/rcupdate.h
   964	 * checks are done in macros here.
   965	 */
   966	#define kfree_rcu(ptr, rcu_head)					\
   967		__kfree_rcu(&((ptr)->rcu_head), offsetof(typeof(*(ptr)), rcu_head))
   968	
 > 969	#endif /* __LINUX_RCUPDATE_H */

---
0-DAY kernel build testing backend         Open Source Technology Centre
Fengguang Wu <wfg@linux.intel.com>                     Intel Corporation