On Wed, Jul 28, 2021 at 11:25:44PM +0200, Ilya Leoshkevich wrote: > Hello, > > This series implements the stop_machine()-less ftrace code patching > for s390. It's trickier than that of e.g. Intel, because the only > on-the-fly code patching allowed by s390 is changing a mask of a > conditional branch instruction. Patch 1 contains a new common code hook > that we need for that, patch 2 contains the actual implementation as > well as explanation of all the small details. > > We would like to take this series through the s390 tree, and we need a > review on the patch 1 for that. Could you please take a look? > > Best regards, > Ilya > > Ilya Leoshkevich (2): > ftrace: Introduce ftrace_need_init_nop() > s390/ftrace: implement hotpatching > > arch/s390/include/asm/ftrace.h | 46 +------ > arch/s390/include/asm/ftrace.lds.h | 21 +++ > arch/s390/include/asm/module.h | 8 ++ > arch/s390/kernel/ftrace.c | 207 ++++++++++++++++++++++++++--- > arch/s390/kernel/ftrace.h | 24 ++++ > arch/s390/kernel/module.c | 45 +++++++ > arch/s390/kernel/vmlinux.lds.S | 2 + > include/linux/ftrace.h | 16 +++ > kernel/trace/ftrace.c | 4 +- > 9 files changed, 314 insertions(+), 59 deletions(-) > create mode 100644 arch/s390/include/asm/ftrace.lds.h > create mode 100644 arch/s390/kernel/ftrace.h Series applied, thank you!
