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linux_kselftest-kunit-fixes-6.8-rc3

Browse Source 
This kunit fixes update for Linux 6.8-rc3 consists of NULL vs IS_ERR()
 bug fixes, documentation update, MAINTAINERS file update to add
 Rae Moar as a reviewer, and a fix to run test suites only after module
 initialization completes.
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Merge tag 'linux_kselftest-kunit-fixes-6.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kunit fixes from Shuah Khan:
 "NULL vs IS_ERR() bug fixes, documentation update, MAINTAINERS file
  update to add Rae Moar as a reviewer, and a fix to run test suites
  only after module initialization completes"

* tag 'linux_kselftest-kunit-fixes-6.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  Documentation: KUnit: Update the instructions on how to test static functions
  kunit: run test suites only after module initialization completes
  MAINTAINERS: kunit: Add Rae Moar as a reviewer
  kunit: device: Fix a NULL vs IS_ERR() check in init()
  kunit: Fix a NULL vs IS_ERR() bug
This commit is contained in:
Linus Torvalds 2024-01-30 15:12:58 -08:00
commit 2a6526c4f3
6 changed files with 36 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
Documentation/dev-tools/kunit/usage.rst
View File

@ -671,8 +671,23 @@ Testing Static Functions
------------------------
If we do not want to expose functions or variables for testing, one option is to
conditionally ``#include`` the test file at the end of your .c file. For
example:
conditionally export the used symbol. For example:
.. code-block:: c
/* In my_file.c */
VISIBLE_IF_KUNIT int do_interesting_thing();
EXPORT_SYMBOL_IF_KUNIT(do_interesting_thing);
/* In my_file.h */
#if IS_ENABLED(CONFIG_KUNIT)
int do_interesting_thing(void);
#endif
Alternatively, you could conditionally ``#include`` the test file at the end of
your .c file. For example:
.. code-block:: c

1
MAINTAINERS
View File

@ -11725,6 +11725,7 @@ F: fs/smb/server/
KERNEL UNIT TESTING FRAMEWORK (KUnit)
M: Brendan Higgins <brendanhiggins@google.com>
M: David Gow <davidgow@google.com>
R: Rae Moar <rmoar@google.com>
L: linux-kselftest@vger.kernel.org
L: kunit-dev@googlegroups.com
S: Maintained

4
lib/kunit/device.c
View File

@ -45,8 +45,8 @@ int kunit_bus_init(void)
int error;
kunit_bus_device = root_device_register("kunit");
if (!kunit_bus_device)
return -ENOMEM;
if (IS_ERR(kunit_bus_device))
return PTR_ERR(kunit_bus_device);
error = bus_register(&kunit_bus_type);
if (error)

4
lib/kunit/executor.c
View File

@ -146,6 +146,10 @@ void kunit_free_suite_set(struct kunit_suite_set suite_set)
kfree(suite_set.start);
}
/*
* Filter and reallocate test suites. Must return the filtered test suites set
* allocated at a valid virtual address or NULL in case of error.
*/
struct kunit_suite_set
kunit_filter_suites(const struct kunit_suite_set *suite_set,
const char *filter_glob,

2
lib/kunit/kunit-test.c
View File

@ -720,7 +720,7 @@ static void kunit_device_cleanup_test(struct kunit *test)
long action_was_run = 0;
test_device = kunit_device_register(test, "my_device");
KUNIT_ASSERT_NOT_NULL(test, test_device);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, test_device);
/* Add an action to verify cleanup. */
devm_add_action(test_device, test_dev_action, &action_was_run);

14
lib/kunit/test.c
View File

@ -17,6 +17,7 @@
#include <linux/panic.h>
#include <linux/sched/debug.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include "debugfs.h"
#include "device-impl.h"
@ -801,12 +802,19 @@ static void kunit_module_exit(struct module *mod)
};
const char *action = kunit_action();
/*
* Check if the start address is a valid virtual address to detect
* if the module load sequence has failed and the suite set has not
* been initialized and filtered.
*/
if (!suite_set.start || !virt_addr_valid(suite_set.start))
return;
if (!action)
__kunit_test_suites_exit(mod->kunit_suites,
mod->num_kunit_suites);
if (suite_set.start)
kunit_free_suite_set(suite_set);
kunit_free_suite_set(suite_set);
}
static int kunit_module_notify(struct notifier_block *nb, unsigned long val,
@ -816,12 +824,12 @@ static int kunit_module_notify(struct notifier_block *nb, unsigned long val,
switch (val) {
case MODULE_STATE_LIVE:
kunit_module_init(mod);
break;
case MODULE_STATE_GOING:
kunit_module_exit(mod);
break;
case MODULE_STATE_COMING:
kunit_module_init(mod);
break;
case MODULE_STATE_UNFORMED:
break;