[bp:rc0+notifiers 32/32] arch/s390/kernel/ipl.c:2072:9: warning: ignoring return value of 'atomic_notifier_chain_register' declared with attribute 'warn_unused_result'
From: kernel test robot
Date: Sat Nov 06 2021 - 14:34:40 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git rc0+notifiers
head: 29ab05dcfc8e05ffc1cae77249ea956b787939d2
commit: 29ab05dcfc8e05ffc1cae77249ea956b787939d2 [32/32] notifier: Return an error when callback is already registered
config: s390-defconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 11.2.0
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/bp/bp.git/commit/?id=29ab05dcfc8e05ffc1cae77249ea956b787939d2
git remote add bp https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git
git fetch --no-tags bp rc0+notifiers
git checkout 29ab05dcfc8e05ffc1cae77249ea956b787939d2
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
arch/s390/kernel/ipl.c: In function 'setup_ipl':
>> arch/s390/kernel/ipl.c:2072:9: warning: ignoring return value of 'atomic_notifier_chain_register' declared with attribute 'warn_unused_result' [-Wunused-result]
2072 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
arch/s390/kvm/kvm-s390.c: In function 'kvm_arch_hardware_setup':
>> arch/s390/kvm/kvm-s390.c:328:9: warning: ignoring return value of 'atomic_notifier_chain_register' declared with attribute 'warn_unused_result' [-Wunused-result]
328 | atomic_notifier_chain_register(&s390_epoch_delta_notifier,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
329 | &kvm_clock_notifier);
| ~~~~~~~~~~~~~~~~~~~~
--
drivers/s390/char/con3270.c: In function 'con3270_init':
>> drivers/s390/char/con3270.c:644:9: warning: ignoring return value of 'atomic_notifier_chain_register' declared with attribute 'warn_unused_result' [-Wunused-result]
644 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
drivers/s390/char/con3215.c: In function 'con3215_init':
>> drivers/s390/char/con3215.c:868:9: warning: ignoring return value of 'atomic_notifier_chain_register' declared with attribute 'warn_unused_result' [-Wunused-result]
868 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
drivers/s390/char/sclp_con.c: In function 'sclp_console_init':
>> drivers/s390/char/sclp_con.c:288:9: warning: ignoring return value of 'atomic_notifier_chain_register' declared with attribute 'warn_unused_result' [-Wunused-result]
288 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
drivers/s390/char/sclp_vt220.c: In function 'sclp_vt220_con_init':
>> drivers/s390/char/sclp_vt220.c:839:9: warning: ignoring return value of 'atomic_notifier_chain_register' declared with attribute 'warn_unused_result' [-Wunused-result]
839 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
drivers/s390/char/zcore.c: In function 'zcore_init':
>> drivers/s390/char/zcore.c:326:9: warning: ignoring return value of 'atomic_notifier_chain_register' declared with attribute 'warn_unused_result' [-Wunused-result]
326 | atomic_notifier_chain_register(&panic_notifier_list, &zcore_on_panic_notifier);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +2072 arch/s390/kernel/ipl.c
99ca4e582d4a40 Michael Holzheu 2008-01-26 2044
99ca4e582d4a40 Michael Holzheu 2008-01-26 2045 void __init setup_ipl(void)
99ca4e582d4a40 Michael Holzheu 2008-01-26 2046 {
bdbfe18595ceab Vasily Gorbik 2018-04-03 2047 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
bdbfe18595ceab Vasily Gorbik 2018-04-03 2048
99ca4e582d4a40 Michael Holzheu 2008-01-26 2049 ipl_info.type = get_ipl_type();
99ca4e582d4a40 Michael Holzheu 2008-01-26 2050 switch (ipl_info.type) {
99ca4e582d4a40 Michael Holzheu 2008-01-26 2051 case IPL_TYPE_CCW:
86c74d869d321b Martin Schwidefsky 2019-02-20 2052 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
86c74d869d321b Martin Schwidefsky 2019-02-20 2053 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
99ca4e582d4a40 Michael Holzheu 2008-01-26 2054 break;
99ca4e582d4a40 Michael Holzheu 2008-01-26 2055 case IPL_TYPE_FCP:
99ca4e582d4a40 Michael Holzheu 2008-01-26 2056 case IPL_TYPE_FCP_DUMP:
18e22a17722600 Sebastian Ott 2015-06-29 2057 ipl_info.data.fcp.dev_id.ssid = 0;
86c74d869d321b Martin Schwidefsky 2019-02-20 2058 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
86c74d869d321b Martin Schwidefsky 2019-02-20 2059 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
86c74d869d321b Martin Schwidefsky 2019-02-20 2060 ipl_info.data.fcp.lun = ipl_block.fcp.lun;
99ca4e582d4a40 Michael Holzheu 2008-01-26 2061 break;
3737e8ee4f2fc7 Jason J. Herne 2020-03-02 2062 case IPL_TYPE_NVME:
d70e38cb1deef3 Jason J. Herne 2020-03-17 2063 case IPL_TYPE_NVME_DUMP:
3737e8ee4f2fc7 Jason J. Herne 2020-03-02 2064 ipl_info.data.nvme.fid = ipl_block.nvme.fid;
3737e8ee4f2fc7 Jason J. Herne 2020-03-02 2065 ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
3737e8ee4f2fc7 Jason J. Herne 2020-03-02 2066 break;
99ca4e582d4a40 Michael Holzheu 2008-01-26 2067 case IPL_TYPE_NSS:
99ca4e582d4a40 Michael Holzheu 2008-01-26 2068 case IPL_TYPE_UNKNOWN:
99ca4e582d4a40 Michael Holzheu 2008-01-26 2069 /* We have no info to copy */
99ca4e582d4a40 Michael Holzheu 2008-01-26 2070 break;
99ca4e582d4a40 Michael Holzheu 2008-01-26 2071 }
99ca4e582d4a40 Michael Holzheu 2008-01-26 @2072 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
99ca4e582d4a40 Michael Holzheu 2008-01-26 2073 }
99ca4e582d4a40 Michael Holzheu 2008-01-26 2074
:::::: The code at line 2072 was first introduced by commit
:::::: 99ca4e582d4a4088969681efff97be44d98421a1 [S390] kernel: Shutdown Actions Interface
:::::: TO: Michael Holzheu <holzheu@xxxxxxxxxx>
:::::: CC: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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