Re: [PATCH 4/6] um: split up CONFIG_GCOV

On Fri, Mar 12, 2021 at 1:56 AM Johannes Berg [off-list ref] wrote:

From: Johannes Berg <redacted>

It's not always desirable to collect coverage data for the
entire kernel, so split off CONFIG_GCOV_BASE. This option
only enables linking with coverage options, and compiles a
single file (reboot.c) with them as well to force gcov to
be linked into the kernel binary. That way, modules also
work.

To use this new option properly, one needs to manually add
'-fprofile-arcs -ftest-coverage' to the compiler options
of some object(s) or subdir(s) to collect coverage data at
the desired places.

Signed-off-by: Johannes Berg <redacted>

Hey, thanks for doing this! I was looking into this a few weeks ago
and root caused part of the issue in GCC and in the kernel, but I did
not have a fix put together.

Anyway, most of the patches make sense to me, but I am not able to
apply this patch on torvalds/master. Do you mind sending a rebase so I
can test it?

Thanks!

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