On Thu, Sep 3, 2020 at 2:51 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > On Thu, Sep 03, 2020 at 01:30:30PM -0700, Sami Tolvanen wrote: > > From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > > > Add the --mcount option for generating __mcount_loc sections > > needed for dynamic ftrace. Using this pass requires the kernel to > > be compiled with -mfentry and CC_USING_NOP_MCOUNT to be defined > > in Makefile. > > > > Link: https://lore.kernel.org/lkml/20200625200235.GQ4781@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ > > Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > Hmm, I'm not sure why this hasn't gotten picked up yet. Is this expected > to go through -tip or something else? Note that I picked up this patch from Peter's original email, to which I included a link in the commit message, but it wasn't officially submitted as a patch. However, the previous discussion seems to have died, so I included the patch in this series, as it cleanly solves the problem of whitelisting non-call references to __fentry__. I was hoping for Peter and Steven to comment on how they prefer to proceed here. Sami
