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SubjectRe: [PATCH v2 1/1] printk: suppress rcu stall warnings caused by slow console devices
Hi Wander,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.15 next-20211111]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Wander-Lairson-Costa/printk-suppress-rcu-stall-warnings-caused-by-slow/20211112-040059
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git debe436e77c72fcee804fb867f275e6d31aa999c
config: m68k-defconfig (attached as .config)
compiler: m68k-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://github.com/0day-ci/linux/commit/bb0661fcac8e6a708539fe465c8ad7f74ca920fa
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Wander-Lairson-Costa/printk-suppress-rcu-stall-warnings-caused-by-slow/20211112-040059
git checkout bb0661fcac8e6a708539fe465c8ad7f74ca920fa
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

m68k-linux-ld: kernel/printk/printk.o: in function `console_unlock':
printk.c:(.text+0x16f6): undefined reference to `rcu_cpu_stall_suppress'
>> m68k-linux-ld: printk.c:(.text+0x1890): undefined reference to `rcu_cpu_stall_suppress'
m68k-linux-ld: printk.c:(.text+0x16ec): undefined reference to `rcu_cpu_stall_suppress'
m68k-linux-ld: printk.c:(.text+0x1888): undefined reference to `rcu_cpu_stall_suppress'
m68k-linux-ld: printk.c:(.text+0x1982): undefined reference to `rcu_cpu_stall_suppress'

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