It looks like ARM64 in Trusty does not have the Function Tracer support:
phlin@tangerine:~/ubuntu-trusty$ git grep "ifdef CONFIG_FUNCTION_TRACER"
Makefile:ifdef CONFIG_FUNCTION_TRACER
arch/arm/include/asm/ftrace.h:#ifdef CONFIG_FUNCTION_TRACER
arch/arm/kernel/Makefile:ifdef CONFIG_FUNCTION_TRACER
arch/arm/kernel/armksyms.c:#ifdef CONFIG_FUNCTION_TRACER
arch/arm/kernel/entry-common.S:#ifdef CONFIG_FUNCTION_TRACER
arch/blackfin/kernel/bfin_ksyms.c:#ifdef CONFIG_FUNCTION_TRACER
arch/ia64/include/asm/ftrace.h:#ifdef CONFIG_FUNCTION_TRACER
arch/ia64/kernel/entry.S:#ifdef CONFIG_FUNCTION_TRACER
arch/ia64/kernel/ia64_ksyms.c:#ifdef CONFIG_FUNCTION_TRACER
arch/metag/include/asm/ftrace.h:#ifdef CONFIG_FUNCTION_TRACER
...
phlin@tangerine:~/ubuntu-trusty/arch/arm64$ grep -r HAVE_FUNCTION_TRACER *
phlin@tangerine:~/ubuntu-trusty/arch/arm64$
I will just disable the test for Trusty ARM64.
** Summary changed:
- Please enable the config for ftrace on T-ARM64
+ Please enable the config for ftrace on T-ARM64 (ubuntu_ftrace_smoke_test
failed)
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
** Changed in: linux (Ubuntu Trusty)
Status: Confirmed => Won't Fix
** Changed in: ubuntu-kernel-tests
Status: New => In Progress
** Changed in: ubuntu-kernel-tests
Assignee: (unassigned) => Po-Hsu Lin (cypressyew)
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https://bugs.launchpad.net/bugs/1820988
Title:
Please enable the config for ftrace on T-ARM64
(ubuntu_ftrace_smoke_test failed)
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