diff options
| author | David Gow <davidgow@google.com> | 2022-11-25 16:43:04 +0800 |
|---|---|---|
| committer | Shuah Khan <skhan@linuxfoundation.org> | 2022-12-12 14:13:47 -0700 |
| commit | 908d0c177bbc7c34ab9129c6f2bcd87487115632 (patch) | |
| tree | 80037e1544ea24f7f6d7e02dd6270fe0a9ba941d /include/kunit/test.h | |
| parent | 309e22effb741a8c65131a2694a49839fd685a27 (diff) | |
kunit: Provide a static key to check if KUnit is actively running tests
KUnit does a few expensive things when enabled. This hasn't been a
problem because KUnit was only enabled on test kernels, but with a few
people enabling (but not _using_) KUnit on production systems, we need a
runtime way of handling this.
Provide a 'kunit_running' static key (defaulting to false), which allows
us to hide any KUnit code behind a static branch. This should reduce the
performance impact (on other code) of having KUnit enabled to a single
NOP when no tests are running.
Note that, while it looks unintuitive, tests always run entirely within
__kunit_test_suites_init(), so it's safe to decrement the static key at
the end of this function, rather than in __kunit_test_suites_exit(),
which is only there to clean up results in debugfs.
Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Daniel Latypov <dlatypov@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'include/kunit/test.h')
| -rw-r--r-- | include/kunit/test.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/kunit/test.h b/include/kunit/test.h index 4666a4d199ea..87ea90576b50 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -16,6 +16,7 @@ #include <linux/container_of.h> #include <linux/err.h> #include <linux/init.h> +#include <linux/jump_label.h> #include <linux/kconfig.h> #include <linux/kref.h> #include <linux/list.h> @@ -27,6 +28,9 @@ #include <asm/rwonce.h> +/* Static key: true if any KUnit tests are currently running */ +DECLARE_STATIC_KEY_FALSE(kunit_running); + struct kunit; /* Size of log associated with test. */ |