From: kernel test robot <lkp@intel.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: oe-kbuild-all@lists.linux.dev, linux-mips@vger.kernel.org,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Subject: [mips-linux:mips-next 4/29] drivers/char/mem.c:164:25: error: implicit declaration of function 'unxlate_dev_mem_ptr'; did you mean 'xlate_dev_mem_ptr'?
Date: Sat, 10 Jun 2023 02:44:40 +0800 [thread overview]
Message-ID: <202306100214.RjlWlYDU-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git mips-next
head: 5cad8323040bb8d47e130c10ea4dcb7175c7602a
commit: 99b619b37ae151dc0fcdffcae48b5a5ad90ebde8 [4/29] mips: provide unxlate_dev_mem_ptr() in asm/io.h
config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20230610/202306100214.RjlWlYDU-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build):
mkdir -p ~/bin
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/mips/linux.git/commit/?id=99b619b37ae151dc0fcdffcae48b5a5ad90ebde8
git remote add mips-linux https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git
git fetch --no-tags mips-linux mips-next
git checkout 99b619b37ae151dc0fcdffcae48b5a5ad90ebde8
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=sh olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash drivers/char/
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306100214.RjlWlYDU-lkp@intel.com/
All errors (new ones prefixed by >>):
drivers/char/mem.c: In function 'read_mem':
>> drivers/char/mem.c:164:25: error: implicit declaration of function 'unxlate_dev_mem_ptr'; did you mean 'xlate_dev_mem_ptr'? [-Werror=implicit-function-declaration]
164 | unxlate_dev_mem_ptr(p, ptr);
| ^~~~~~~~~~~~~~~~~~~
| xlate_dev_mem_ptr
cc1: some warnings being treated as errors
vim +164 drivers/char/mem.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 133
22ec1a2aea73b9 Kees Cook 2017-12-01 134 bounce = kmalloc(PAGE_SIZE, GFP_KERNEL);
22ec1a2aea73b9 Kees Cook 2017-12-01 135 if (!bounce)
22ec1a2aea73b9 Kees Cook 2017-12-01 136 return -ENOMEM;
22ec1a2aea73b9 Kees Cook 2017-12-01 137
^1da177e4c3f41 Linus Torvalds 2005-04-16 138 while (count > 0) {
fa29e97bb8c70f Wu Fengguang 2009-12-14 139 unsigned long remaining;
b5b38200ebe548 Kees Cook 2018-03-27 140 int allowed, probe;
fa29e97bb8c70f Wu Fengguang 2009-12-14 141
f222318e9c3a31 Wu Fengguang 2009-12-14 142 sz = size_inside_page(p, count);
^1da177e4c3f41 Linus Torvalds 2005-04-16 143
22ec1a2aea73b9 Kees Cook 2017-12-01 144 err = -EPERM;
a4866aa812518e Kees Cook 2017-04-05 145 allowed = page_is_allowed(p >> PAGE_SHIFT);
a4866aa812518e Kees Cook 2017-04-05 146 if (!allowed)
22ec1a2aea73b9 Kees Cook 2017-12-01 147 goto failed;
22ec1a2aea73b9 Kees Cook 2017-12-01 148
22ec1a2aea73b9 Kees Cook 2017-12-01 149 err = -EFAULT;
a4866aa812518e Kees Cook 2017-04-05 150 if (allowed == 2) {
a4866aa812518e Kees Cook 2017-04-05 151 /* Show zeros for restricted memory. */
a4866aa812518e Kees Cook 2017-04-05 152 remaining = clear_user(buf, sz);
a4866aa812518e Kees Cook 2017-04-05 153 } else {
^1da177e4c3f41 Linus Torvalds 2005-04-16 154 /*
a4866aa812518e Kees Cook 2017-04-05 155 * On ia64 if a page has been mapped somewhere as
a4866aa812518e Kees Cook 2017-04-05 156 * uncached, then it must also be accessed uncached
a4866aa812518e Kees Cook 2017-04-05 157 * by the kernel or data corruption may occur.
^1da177e4c3f41 Linus Torvalds 2005-04-16 158 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 159 ptr = xlate_dev_mem_ptr(p);
e045fb2a988a9a venkatesh.pallipadi@intel.com 2008-03-18 160 if (!ptr)
22ec1a2aea73b9 Kees Cook 2017-12-01 161 goto failed;
a4866aa812518e Kees Cook 2017-04-05 162
fe557319aa06c2 Christoph Hellwig 2020-06-17 163 probe = copy_from_kernel_nofault(bounce, ptr, sz);
e045fb2a988a9a venkatesh.pallipadi@intel.com 2008-03-18 @164 unxlate_dev_mem_ptr(p, ptr);
b5b38200ebe548 Kees Cook 2018-03-27 165 if (probe)
22ec1a2aea73b9 Kees Cook 2017-12-01 166 goto failed;
22ec1a2aea73b9 Kees Cook 2017-12-01 167
22ec1a2aea73b9 Kees Cook 2017-12-01 168 remaining = copy_to_user(buf, bounce, sz);
a4866aa812518e Kees Cook 2017-04-05 169 }
a4866aa812518e Kees Cook 2017-04-05 170
fa29e97bb8c70f Wu Fengguang 2009-12-14 171 if (remaining)
22ec1a2aea73b9 Kees Cook 2017-12-01 172 goto failed;
e045fb2a988a9a venkatesh.pallipadi@intel.com 2008-03-18 173
^1da177e4c3f41 Linus Torvalds 2005-04-16 174 buf += sz;
^1da177e4c3f41 Linus Torvalds 2005-04-16 175 p += sz;
^1da177e4c3f41 Linus Torvalds 2005-04-16 176 count -= sz;
^1da177e4c3f41 Linus Torvalds 2005-04-16 177 read += sz;
8619e5bdeee8b2 Tetsuo Handa 2019-08-26 178 if (should_stop_iteration())
8619e5bdeee8b2 Tetsuo Handa 2019-08-26 179 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 180 }
22ec1a2aea73b9 Kees Cook 2017-12-01 181 kfree(bounce);
^1da177e4c3f41 Linus Torvalds 2005-04-16 182
^1da177e4c3f41 Linus Torvalds 2005-04-16 183 *ppos += read;
^1da177e4c3f41 Linus Torvalds 2005-04-16 184 return read;
22ec1a2aea73b9 Kees Cook 2017-12-01 185
22ec1a2aea73b9 Kees Cook 2017-12-01 186 failed:
22ec1a2aea73b9 Kees Cook 2017-12-01 187 kfree(bounce);
22ec1a2aea73b9 Kees Cook 2017-12-01 188 return err;
^1da177e4c3f41 Linus Torvalds 2005-04-16 189 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 190
:::::: The code at line 164 was first introduced by commit
:::::: e045fb2a988a9a1964059b0d33dbaf18d12f925f x86: PAT avoid aliasing in /dev/mem read/write
:::::: TO: venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com>
:::::: CC: Ingo Molnar <mingo@elte.hu>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2023-06-09 18:45 UTC|newest]
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