On Wed, 8 May 2019 13:30:22 +0900 Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote: > > To solve this, an int3_emulate_call() is created for x86_64 to allow > > ftrace on x86_64 to emulate the call to ftrace_regs_caller() which will > > make sure all the registered handlers to that function are still called. > > And this keeps live kernel patching happy! > > Out of curiosity, would you have any idea to re-use these function for > other use-case? Maybe kprobes can reuse it, but very limited use-case. Yes, but only for x86_64. > > > To mimimize the changes, and to avoid controversial patches, this > > only changes x86_64. Due to the way x86_32 implements the regs->sp > > the complexity of emulating calls on that platform is too much for > > stable patches, and live kernel patching does not support x86_32 anyway. > > This series looks good to me. > > Reviewed-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Thanks Masami! -- Steve
