On Tue, Sep 29, 2020 at 02:46:02PM -0700, Sami Tolvanen wrote: > Furthermore, patches 4-8 include Peter's patch for generating > __mcount_loc with objtool, and build system changes to enable it on > x86. With these patches, we no longer need to annotate functions > that have non-call references to __fentry__ with LTO, which makes > supporting dynamic ftrace much simpler. Peter, can you take patches 4-8 into -tip? I think it'd make sense to keep them together. Steven, it sounds like you're okay with the changes (i.e. Sami showed the one concern you had was already handled)? Getting these into v5.10 would be really really nice. I'd really like to get the tree-spanning prerequisites nailed down for this series. It's been difficult to coordinate given the multiple maintainers. :) Specifically these patches: Peter Zijlstra (1): objtool: Add a pass for generating __mcount_loc Sami Tolvanen (4): objtool: Don't autodetect vmlinux.o tracing: move function tracer options to Kconfig tracing: add support for objtool mcount x86, build: use objtool mcount https://lore.kernel.org/lkml/20200929214631.3516445-5-samitolvanen@xxxxxxxxxx/ https://lore.kernel.org/lkml/20200929214631.3516445-6-samitolvanen@xxxxxxxxxx/ https://lore.kernel.org/lkml/20200929214631.3516445-7-samitolvanen@xxxxxxxxxx/ https://lore.kernel.org/lkml/20200929214631.3516445-8-samitolvanen@xxxxxxxxxx/ https://lore.kernel.org/lkml/20200929214631.3516445-9-samitolvanen@xxxxxxxxxx/ Thanks! -- Kees Cook
