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* [ebiggers:fscrypt-pending 3/5] include/linux/compiler.h:350:38: error: call to '__compiletime_assert_84' declared with attribute error: BUILD_BUG failed
@ 2019-10-21 23:53 kbuild test robot
  0 siblings, 0 replies; only message in thread
From: kbuild test robot @ 2019-10-21 23:53 UTC (permalink / raw)
  To: kbuild-all

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git fscrypt-pending
head:   c90923946c2d809cc3918e59fd24078a63b54ab0
commit: 6f1c756c2a8fb460b754350f5d65736800905082 [3/5] fscrypt: avoid data race on fscrypt_mode::logged_impl_name
config: riscv-allmodconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 6f1c756c2a8fb460b754350f5d65736800905082
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=riscv 

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

All errors (new ones prefixed by >>):

   fs/crypto/keysetup.c: In function 'fscrypt_allocate_skcipher':
   fs/crypto/keysetup.c:84:5: warning: '__ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if (!xchg(&mode->logged_impl_name, true)) {
        ^
   In file included from arch/riscv/include/asm/bug.h:9:0,
                    from include/linux/bug.h:5,
                    from arch/riscv/include/asm/cmpxchg.h:9,
                    from arch/riscv/include/asm/atomic.h:19,
                    from include/linux/atomic.h:7,
                    from include/linux/crypto.h:15,
                    from include/crypto/skcipher.h:11,
                    from fs/crypto/keysetup.c:11:
>> include/linux/compiler.h:350:38: error: call to '__compiletime_assert_84' declared with attribute error: BUILD_BUG failed
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
                                         ^
   include/linux/compiler.h:331:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
    #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
                        ^~~~~~~~~~~~~~~~
   arch/riscv/include/asm/cmpxchg.h:138:3: note: in expansion of macro 'BUILD_BUG'
      BUILD_BUG();      \
      ^~~~~~~~~
   arch/riscv/include/asm/cmpxchg.h:146:23: note: in expansion of macro '__xchg'
     (__typeof__(*(ptr))) __xchg((ptr), _x_, sizeof(*(ptr))); \
                          ^~~~~~
   fs/crypto/keysetup.c:84:7: note: in expansion of macro 'xchg'
     if (!xchg(&mode->logged_impl_name, true)) {
          ^~~~
--
   fs//crypto/keysetup.c: In function 'fscrypt_allocate_skcipher':
   fs//crypto/keysetup.c:84:5: warning: '__ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if (!xchg(&mode->logged_impl_name, true)) {
        ^
   In file included from arch/riscv/include/asm/bug.h:9:0,
                    from include/linux/bug.h:5,
                    from arch/riscv/include/asm/cmpxchg.h:9,
                    from arch/riscv/include/asm/atomic.h:19,
                    from include/linux/atomic.h:7,
                    from include/linux/crypto.h:15,
                    from include/crypto/skcipher.h:11,
                    from fs//crypto/keysetup.c:11:
>> include/linux/compiler.h:350:38: error: call to '__compiletime_assert_84' declared with attribute error: BUILD_BUG failed
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
                                         ^
   include/linux/compiler.h:331:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
    #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
                        ^~~~~~~~~~~~~~~~
   arch/riscv/include/asm/cmpxchg.h:138:3: note: in expansion of macro 'BUILD_BUG'
      BUILD_BUG();      \
      ^~~~~~~~~
   arch/riscv/include/asm/cmpxchg.h:146:23: note: in expansion of macro '__xchg'
     (__typeof__(*(ptr))) __xchg((ptr), _x_, sizeof(*(ptr))); \
                          ^~~~~~
   fs//crypto/keysetup.c:84:7: note: in expansion of macro 'xchg'
     if (!xchg(&mode->logged_impl_name, true)) {
          ^~~~

vim +/__compiletime_assert_84 +350 include/linux/compiler.h

9a8ab1c39970a4 Daniel Santos 2013-02-21  336  
9a8ab1c39970a4 Daniel Santos 2013-02-21  337  #define _compiletime_assert(condition, msg, prefix, suffix) \
9a8ab1c39970a4 Daniel Santos 2013-02-21  338  	__compiletime_assert(condition, msg, prefix, suffix)
9a8ab1c39970a4 Daniel Santos 2013-02-21  339  
9a8ab1c39970a4 Daniel Santos 2013-02-21  340  /**
9a8ab1c39970a4 Daniel Santos 2013-02-21  341   * compiletime_assert - break build and emit msg if condition is false
9a8ab1c39970a4 Daniel Santos 2013-02-21  342   * @condition: a compile-time constant condition to check
9a8ab1c39970a4 Daniel Santos 2013-02-21  343   * @msg:       a message to emit if condition is false
9a8ab1c39970a4 Daniel Santos 2013-02-21  344   *
9a8ab1c39970a4 Daniel Santos 2013-02-21  345   * In tradition of POSIX assert, this macro will break the build if the
9a8ab1c39970a4 Daniel Santos 2013-02-21  346   * supplied condition is *false*, emitting the supplied error message if the
9a8ab1c39970a4 Daniel Santos 2013-02-21  347   * compiler has support to do so.
9a8ab1c39970a4 Daniel Santos 2013-02-21  348   */
9a8ab1c39970a4 Daniel Santos 2013-02-21  349  #define compiletime_assert(condition, msg) \
9a8ab1c39970a4 Daniel Santos 2013-02-21 @350  	_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
9a8ab1c39970a4 Daniel Santos 2013-02-21  351  

:::::: The code at line 350 was first introduced by commit
:::::: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG

:::::: TO: Daniel Santos <daniel.santos@pobox.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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2019-10-21 23:53 [ebiggers:fscrypt-pending 3/5] include/linux/compiler.h:350:38: error: call to '__compiletime_assert_84' declared with attribute error: BUILD_BUG failed kbuild test robot

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