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Subjectarch/x86//kernel/ftrace.c:35:3: error: #error The following combination is not supported: ((compiler missing -mfentry) || (CONFIG_X86_32 and !CONFIG_DYNAMIC_FTRACE)) && CONFIG_FUNCTION_GRAPH_TRACER && CONFIG_CC_OPTIMIZE_FOR_SIZE
Hi Josh,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d5ff0814fda50f0306e102f39640cf5bb76af08e
commit: 3f135e57a4f76d24ae8d8a490314331f0ced40c5 x86/build: Mostly disable '-maccumulate-outgoing-args'
date: 2 weeks ago
config: x86_64-randconfig-s1-04160822 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
git checkout 3f135e57a4f76d24ae8d8a490314331f0ced40c5
# save the attached .config to linux build tree
make ARCH=x86_64

All errors (new ones prefixed by >>):

>> arch/x86//kernel/ftrace.c:35:3: error: #error The following combination is not supported: ((compiler missing -mfentry) || (CONFIG_X86_32 and !CONFIG_DYNAMIC_FTRACE)) && CONFIG_FUNCTION_GRAPH_TRACER && CONFIG_CC_OPTIMIZE_FOR_SIZE

vim +35 arch/x86//kernel/ftrace.c

29 #include <asm/ftrace.h>
30 #include <asm/nops.h>
31
32 #if defined(CONFIG_FUNCTION_GRAPH_TRACER) && \
33 !defined(CC_USING_FENTRY) && \
34 !defined(CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE)
> 35 # error The following combination is not supported: ((compiler missing -mfentry) || (CONFIG_X86_32 and !CONFIG_DYNAMIC_FTRACE)) && CONFIG_FUNCTION_GRAPH_TRACER && CONFIG_CC_OPTIMIZE_FOR_SIZE
36 #endif
37
38 #ifdef CONFIG_DYNAMIC_FTRACE

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