On 20/12/15 22:52, kbuild test robot wrote:
Hi Daniel,
[auto build test ERROR on v4.4-rc5]
[also build test ERROR on next-20151218]
[cannot apply to tip/irq/core]
url:
https://github.com/0day-ci/linux/commits/Daniel-Thompson/irq-arm-Use-FIQ-for-NMI-backtrace-when-possible/20151221-045854
config: arm-socfpga_defconfig (attached as .config)
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=arm
All error/warnings (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/list.h:4,
from include/linux/module.h:9,
from arch/arm/kernel/smp.c:10:
arch/arm/kernel/smp.c: In function 'raise_nmi':
include/linux/compiler.h:484:38: error: call to '__compiletime_assert_766'
declared with attribute error: BUILD_BUG_ON failed: SMP_IPI_FIQ_MASK !=
BIT(IPI_CPU_BACKTRACE)
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/compiler.h:467:4: note: in definition of macro
'__compiletime_assert'
prefix ## suffix(); \
^
include/linux/compiler.h:484:2: note: in expansion of macro
'_compiletime_assert'
_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
^
include/linux/bug.h:50:37: note: in expansion of macro 'compiletime_assert'
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^
include/linux/bug.h:74:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^
arch/arm/kernel/smp.c:766:2: note: in expansion of macro 'BUILD_BUG_ON'
BUILD_BUG_ON(SMP_IPI_FIQ_MASK != BIT(IPI_CPU_BACKTRACE));
This should be a false alarm or at least, the BUILD_BUG_ON() is doing
exactly what it was intended to.
I forgot to mention it in the covering letter (and will fix next time)
but my patchset requires a fix from Marc Zyngier which changes the
numeric value of IPI_CPU_BACKTRACE[1].
Daniel.
1: http://thread.gmane.org/gmane.linux.ports.arm.kernel/464985
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