Re: [PATCH] printk: Userspace format enumeration support

[kernel test robot <lkp@intel.com>]

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Hi Chris,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on jeyu/modules-next]
[also build test ERROR on linux/master soc/for-next openrisc/for-next powerpc/next asm-generic/master linus/master v5.11-rc6 next-20210125]
[cannot apply to tip/x86/core]
[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/Chris-Down/printk-Userspace-format-enumeration-support/20210204-234240
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux.git modules-next
config: um-x86_64_defconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/08a6039db35c32e39de288d58d0362013fdfb387
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Chris-Down/printk-Userspace-format-enumeration-support/20210204-234240
        git checkout 08a6039db35c32e39de288d58d0362013fdfb387
        # save the attached .config to linux build tree
        make W=1 ARCH=um SUBARCH=x86_64

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 >>):

   /usr/bin/ld: arch/um/drivers/xterm.o: in function `xterm_open':
>> xterm.c:(.text+0x16b): undefined reference to `printk'
>> /usr/bin/ld: xterm.c:(.text+0x1a8): undefined reference to `printk'
   /usr/bin/ld: xterm.c:(.text+0x1f4): undefined reference to `printk'
   /usr/bin/ld: xterm.c:(.text+0x25e): undefined reference to `printk'
   /usr/bin/ld: xterm.c:(.text+0x2b5): undefined reference to `printk'
   /usr/bin/ld: arch/um/drivers/xterm.o:xterm.c:(.text+0x31c): more undefined references to `printk' follow
   collect2: error: ld returned 1 exit status

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

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