linux-kernel - [kbusch:dma-prereg-v5 5/6] include/linux/uaccess.h:124: undefined reference to `io_dma

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Date:   Wed, 27 Jul 2022 00:16:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Keith Busch <kbusch@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [kbusch:dma-prereg-v5 5/6] include/linux/uaccess.h:124: undefined
 reference to `io_dma_unmap'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/kbusch/linux.git dma-prereg-v5
head:   4f4a93bf02dcf20e9a4a3ac0c9cd39d79e9e540e
commit: 1b0c9acb050749ce7ad964cc66eef72779835832 [5/6] io_uring: add support for dma pre-mapping
config: xtensa-randconfig-r001-20220724 (https://download.01.org/0day-ci/archive/20220727/202207270041.8fQ9kcrB-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 12.1.0
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/kbusch/linux.git/commit/?id=1b0c9acb050749ce7ad964cc66eef72779835832
        git remote add kbusch https://git.kernel.org/pub/scm/linux/kernel/git/kbusch/linux.git
        git fetch --no-tags kbusch dma-prereg-v5
        git checkout 1b0c9acb050749ce7ad964cc66eef72779835832
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=xtensa SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   xtensa-linux-ld: io_uring/rsrc.o: in function `_copy_from_user':
>> include/linux/uaccess.h:124: undefined reference to `io_dma_unmap'
   xtensa-linux-ld: io_uring/rsrc.o: in function `io_buffer_unmap':
   io_uring/rsrc.c:151: undefined reference to `io_dma_unmap'


vim +124 include/linux/uaccess.h

d597580d373774 Al Viro              2017-03-20  110  
d597580d373774 Al Viro              2017-03-20  111  #ifdef INLINE_COPY_FROM_USER
9dd819a15162f8 Kees Cook            2019-09-25  112  static inline __must_check unsigned long
d597580d373774 Al Viro              2017-03-20  113  _copy_from_user(void *to, const void __user *from, unsigned long n)
d597580d373774 Al Viro              2017-03-20  114  {
d597580d373774 Al Viro              2017-03-20  115  	unsigned long res = n;
9c5f6908de03a4 Al Viro              2017-06-29  116  	might_fault();
4d0e9df5e43dba Albert van der Linde 2020-10-15  117  	if (!should_fail_usercopy() && likely(access_ok(from, n))) {
76d6f06c36a3b5 Marco Elver          2020-01-21  118  		instrument_copy_from_user(to, from, n);
d597580d373774 Al Viro              2017-03-20  119  		res = raw_copy_from_user(to, from, n);
9c5f6908de03a4 Al Viro              2017-06-29  120  	}
d597580d373774 Al Viro              2017-03-20  121  	if (unlikely(res))
d597580d373774 Al Viro              2017-03-20  122  		memset(to + (n - res), 0, res);
d597580d373774 Al Viro              2017-03-20  123  	return res;
d597580d373774 Al Viro              2017-03-20 @124  }
d597580d373774 Al Viro              2017-03-20  125  #else
9dd819a15162f8 Kees Cook            2019-09-25  126  extern __must_check unsigned long
d597580d373774 Al Viro              2017-03-20  127  _copy_from_user(void *, const void __user *, unsigned long);
d597580d373774 Al Viro              2017-03-20  128  #endif
d597580d373774 Al Viro              2017-03-20  129  

:::::: The code at line 124 was first introduced by commit
:::::: d597580d373774b1bdab84b3d26ff0b55162b916 generic ...copy_..._user primitives

:::::: TO: Al Viro <viro@...iv.linux.org.uk>
:::::: CC: Al Viro <viro@...iv.linux.org.uk>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp