On Wed, Feb 24, 2021 at 12:38:54PM -0800, Kees Cook wrote:

On Wed, Feb 24, 2021 at 12:17:23PM -0800, Guenter Roeck wrote:

quoted

On Fri, Dec 11, 2020 at 10:46:18AM -0800, Sami Tolvanen wrote:

quoted

Move function tracer options to Kconfig to make it easier to add
new methods for generating __mcount_loc, and to make the options
available also when building kernel modules.

Note that FTRACE_MCOUNT_USE_* options are updated on rebuild and
therefore, work even if the .config was generated in a different
environment.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

With this patch in place, parisc:allmodconfig no longer builds.

Error log:
Arch parisc is not supported with CONFIG_FTRACE_MCOUNT_RECORD at scripts/recordmcount.pl line 405.
make[2]: *** [scripts/mod/empty.o] Error 2

Due to this problem, CONFIG_FTRACE_MCOUNT_RECORD can no longer be
enabled in parisc builds. Since that is auto-selected by DYNAMIC_FTRACE,
DYNAMIC_FTRACE can no longer be enabled, and with it everything that
depends on it.

Ew. Any idea why this didn't show up while it was in linux-next?

It did, I just wasn't able to bisect it there.

Guenter