Hi, Here are the patches for clarifying the requirement of error injectable functions and remove confusing EI_ETYPE_NONE. Here is the thread of discussions which leads this series. https://lore.kernel.org/all/167019256481.3792653.4369637751468386073.stgit@devnote3/T/#u I agreed that NACK the taint flag itself, and I thought I need to update the function error injection so that the developers understand the requirements and carefully use the ALLOW_ERROR_INJECTION() macro. So I removed the confusing EI_ETYPE_NONE (this should not be there, use errno instead), and update the document about error injectable functions. Thank you, --- Masami Hiramatsu (Google) (2): error-injection: Remove EI_ETYPE_NONE docs: fault-injection: Add requirements of error injectable functions Documentation/fault-injection/fault-injection.rst | 65 +++++++++++++++++++++ include/asm-generic/error-injection.h | 7 +- include/linux/error-injection.h | 2 - lib/error-inject.c | 2 - 4 files changed, 71 insertions(+), 5 deletions(-) -- Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>