[PATCH 0/4] s390: DYNAMIC_FTRACE_WITH_DIRECT_CALL support

Heiko Carstens
2021-10-12T13:38:57Z

This small series adds DYNAMIC_FTRACE_WITH_DIRECT_CALL support for
s390 and is based on linux-next 20211012.

Besides the architecture backend this also adds s390 ftrace direct
call samples, and slightly changes config option handling a bit, so
that options only have to be selected. This way also additional future
architectures can easily add their trampolines to the samples.

If ok, I'd like to get this upstream via the s390 tree with the next
merge window.

Heiko Carstens (4):
s390/ftrace: add HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALL support
s390: make STACK_FRAME_OVERHEAD available via asm-offsets.h
samples: add HAVE_SAMPLE_FTRACE_DIRECT config option
samples: add s390 support for ftrace direct call samples

arch/s390/Kconfig | 2 ++
arch/s390/include/asm/ftrace.h | 12 ++++++++
arch/s390/kernel/asm-offsets.c | 1 +
arch/s390/kernel/mcount.S | 23 ++++++++++----
arch/x86/Kconfig | 1 +
samples/Kconfig | 5 ++-
samples/ftrace/ftrace-direct-modify.c | 44 +++++++++++++++++++++++++++
samples/ftrace/ftrace-direct-too.c | 28 +++++++++++++++++
samples/ftrace/ftrace-direct.c | 28 +++++++++++++++++
9 files changed, 137 insertions(+), 7 deletions(-)

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2.25.1