include/linux/kprobes.h:361:2: error: invalid use of undefined type 'struct kprobe_ctlblk'

From: kbuild test robot
Date: Sun Feb 12 2017 - 02:53:01 EST


Hi Russell,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 1ce42845f987e92eabfc6e026d44d826c25c74a5
commit: b2c0b2cbb282f0cf42518ffacbe197e6f2884168 nmi: create generic NMI backtrace implementation
date: 1 year, 7 months ago
config: mn10300-allyesconfig (attached as .config)
compiler: am33_2.0-linux-gcc (GCC) 6.2.0
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
git checkout b2c0b2cbb282f0cf42518ffacbe197e6f2884168
# save the attached .config to linux build tree
make.cross ARCH=mn10300

All errors (new ones prefixed by >>):

In file included from lib/nmi_backtrace.c:17:0:
include/linux/kprobes.h: In function 'get_kprobe_ctlblk':
>> include/linux/kprobes.h:361:2: error: invalid use of undefined type 'struct kprobe_ctlblk'
return this_cpu_ptr(&kprobe_ctlblk);
^~~~~~

vim +361 include/linux/kprobes.h

e65845235 Ananth N Mavinakayanahalli 2005-11-07 355 {
b76834bc1 Christoph Lameter 2010-12-06 356 __this_cpu_write(current_kprobe, NULL);
e65845235 Ananth N Mavinakayanahalli 2005-11-07 357 }
e65845235 Ananth N Mavinakayanahalli 2005-11-07 358
e65845235 Ananth N Mavinakayanahalli 2005-11-07 359 static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
e65845235 Ananth N Mavinakayanahalli 2005-11-07 360 {
bdffd893a Christoph Lameter 2014-04-29 @361 return this_cpu_ptr(&kprobe_ctlblk);
e65845235 Ananth N Mavinakayanahalli 2005-11-07 362 }
e65845235 Ananth N Mavinakayanahalli 2005-11-07 363
^1da177e4 Linus Torvalds 2005-04-16 364 int register_kprobe(struct kprobe *p);

:::::: The code at line 361 was first introduced by commit
:::::: bdffd893a0e9c431304142d12d9a0a21d365c502 tracing: Replace __get_cpu_var uses with this_cpu_ptr

:::::: TO: Christoph Lameter <cl@xxxxxxxxx>
:::::: CC: Steven Rostedt <rostedt@xxxxxxxxxxx>

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