Hi Pan,
[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.8-rc7 next-20160916]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]
[Suggest to use git(>=2.9.0) format-patch --base= (or --base=auto for
convenience) to record what (public, well-known) commit your patch series was
built on]
[Check https://git-scm.com/docs/git-format-patch for more information]
url:
https://github.com/0day-ci/linux/commits/Pan-Xinhui/Implement-qspinlock-pv-qspinlock-on-ppc/20160919-133130
base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-allyesconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget
https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
-O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=powerpc
All errors (new ones prefixed by >>):
In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from include/uapi/linux/posix_types.h:4,
from include/uapi/linux/types.h:13,
from include/linux/types.h:5,
from include/linux/smp.h:10,
from kernel/locking/qspinlock.c:25:
In function '__xchg_relaxed',
inlined from 'queued_spin_lock_slowpath' at
kernel/locking/qspinlock.c:184:14:
>> include/linux/compiler.h:491:38: error: call to '__compiletime_assert_113'
>> declared with attribute error: Unsupported size for __xchg_local
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:474:4: note: in definition of macro
'__compiletime_assert'
prefix ## suffix();\
^~
include/linux/compiler.h:491:2: note: in expansion of macro
'_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^~~
include/linux/bug.h:51:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~
arch/powerpc/include/asm/cmpxchg.h:113:2: note: in expansion of macro
'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(1, "Unsupported size for __xchg_local");
^~~~
vim +/__compiletime_assert_113 +491 include/linux/compiler.h
9a8ab1c3 Daniel Santos 2013-02-21 475
__compiletime_error_fallback(__cond); \
9a8ab1c3 Daniel Santos 2013-02-21 476 } while (0)
9a8ab1c3 Daniel Santos 2013-02-21 477
9a8ab1c3 Daniel Santos 2013-02-21 478 #define _compiletime_assert(condition,
msg, prefix, suffix) \
9a8ab1c3 Daniel Santos 2013-02-21 479 __compiletime_assert(condition,
msg, prefix, suffix)
9a8ab1c3 Daniel Santos 2013-02-21 480
9a8ab1c3 Daniel Santos 2013-02-21 481 /**
9a8ab1c3 Daniel Santos 2013-02-21 482 * compiletime_assert - break build
and emit msg if condition is false
9a8ab1c3 Daniel Santos 2013-02-21 483 * @condition: a compile-time constant
condition to check
9a8ab1c3 Daniel Santos 2013-02-21 484 * @msg: a message to emit if
condition is false
9a8ab1c3 Daniel Santos 2013-02-21 485 *
9a8ab1c3 Daniel Santos 2013-02-21 486 * In tradition of POSIX assert, this
macro will break the build if the
9a8ab1c3 Daniel Santos 2013-02-21 487 * supplied condition is *false*,
emitting the supplied error message if the
9a8ab1c3 Daniel Santos 2013-02-21 488 * compiler has support to do so.
9a8ab1c3 Daniel Santos 2013-02-21 489 */
9a8ab1c3 Daniel Santos 2013-02-21 490 #define compiletime_assert(condition,
msg) \
9a8ab1c3 Daniel Santos 2013-02-21 @491 _compiletime_assert(condition,
msg, __compiletime_assert_, __LINE__)
9a8ab1c3 Daniel Santos 2013-02-21 492
47933ad4 Peter Zijlstra 2013-11-06 493 #define
compiletime_assert_atomic_type(t) \
47933ad4 Peter Zijlstra 2013-11-06 494
compiletime_assert(__native_word(t),\
47933ad4 Peter Zijlstra 2013-11-06 495 "Need native word sized
stores/loads for atomicity.")
47933ad4 Peter Zijlstra 2013-11-06 496
9c3cdc1f Linus Torvalds 2008-05-10 497 /*
9c3cdc1f Linus Torvalds 2008-05-10 498 * Prevent the compiler from merging
or refetching accesses. The compiler
9c3cdc1f Linus Torvalds 2008-05-10 499 * is also forbidden from reordering
successive instances of ACCESS_ONCE(),
:: The code at line 491 was first introduced by commit
:: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce
compiletime_assert & BUILD_BUG_ON_MSG
:: TO: Daniel Santos
:: CC: Linus Torvalds
---
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