[mingo-tip:master 557/2335] kernel/user-return-notifier.c:41:10: error: implicit declaration of function 'preempt_disable'

From: kernel test robot
Date: Wed Mar 16 2022 - 17:11:55 EST


tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git master
head: 85293bf3fca6d85608cff1447ce3097583f15fab
commit: 025a44143e076e9fc9c3ae07986dd86b01330f75 [557/2335] headers/deps: Optimize <linux/sched.h> dependencies, remove <linux/sched/cond_resched.h> inclusion
config: i386-randconfig-a016-20220314 (https://download.01.org/0day-ci/archive/20220317/202203170515.1TR383cF-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a6ec1e3d798f8eab43fb3a91028c6ab04e115fcb)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=025a44143e076e9fc9c3ae07986dd86b01330f75
git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
git fetch --no-tags mingo-tip master
git checkout 025a44143e076e9fc9c3ae07986dd86b01330f75
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

Note: the mingo-tip/master HEAD 85293bf3fca6d85608cff1447ce3097583f15fab builds fine.
It only hurts bisectability.

All errors (new ones prefixed by >>):

>> kernel/user-return-notifier.c:41:10: error: implicit declaration of function 'preempt_disable' [-Werror,-Wimplicit-function-declaration]
head = &get_cpu_var(return_notifier_list);
^
include/linux/percpu-defs.h:277:2: note: expanded from macro 'get_cpu_var'
preempt_disable(); \
^
>> kernel/user-return-notifier.c:44:2: error: implicit declaration of function 'preempt_enable' [-Werror,-Wimplicit-function-declaration]
put_cpu_var(return_notifier_list);
^
include/linux/percpu-defs.h:288:2: note: expanded from macro 'put_cpu_var'
preempt_enable(); \
^
2 errors generated.


vim +/preempt_disable +41 kernel/user-return-notifier.c

7c68af6e32c739 Avi Kivity 2009-09-19 33
7c68af6e32c739 Avi Kivity 2009-09-19 34 /* Calls registered user return notifiers */
7c68af6e32c739 Avi Kivity 2009-09-19 35 void fire_user_return_notifiers(void)
7c68af6e32c739 Avi Kivity 2009-09-19 36 {
7c68af6e32c739 Avi Kivity 2009-09-19 37 struct user_return_notifier *urn;
b67bfe0d42cac5 Sasha Levin 2013-02-27 38 struct hlist_node *tmp2;
7c68af6e32c739 Avi Kivity 2009-09-19 39 struct hlist_head *head;
7c68af6e32c739 Avi Kivity 2009-09-19 40
7c68af6e32c739 Avi Kivity 2009-09-19 @41 head = &get_cpu_var(return_notifier_list);
b67bfe0d42cac5 Sasha Levin 2013-02-27 42 hlist_for_each_entry_safe(urn, tmp2, head, link)
7c68af6e32c739 Avi Kivity 2009-09-19 43 urn->on_user_return(urn);
3c912b6edaac56 Stephen Rothwell 2009-11-02 @44 put_cpu_var(return_notifier_list);

:::::: The code at line 41 was first introduced by commit
:::::: 7c68af6e32c73992bad24107311f3433c89016e2 core, x86: Add user return notifiers

:::::: TO: Avi Kivity <avi@xxxxxxxxxx>
:::::: CC: H. Peter Anvin <hpa@xxxxxxxxx>

---
0-DAY CI Kernel Test Service
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx