On Wed, 2020-07-15 at 17:37 -0700, Brendan Higgins wrote:
On Tue, Jul 14, 2020 at 8:11 PM Vitor Massaru Iha vitor@massaru.org wrote:
Probably want to add more of a description here as what you are doing is not entirely trivial to someone not familiar with mm contexts.
Signed-off-by: Vitor Massaru Iha vitor@massaru.org
include/kunit/test.h | 1 + lib/kunit/try-catch.c | 15 ++++++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/include/kunit/test.h b/include/kunit/test.h index 59f3144f009a..49c38bdcb93e 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -222,6 +222,7 @@ struct kunit { * protect it with some type of lock. */ struct list_head resources; /* Protected by lock. */
struct mm_struct *mm;Part of me thinks we should put a better name here, part of me thinks it is fine because it matches the convention.
Either way, this DEFINITELY deserves a comment explaining what it is, why it exists, and how it should/shouldn't be used.
};
void kunit_init_test(struct kunit *test, const char *name, char *log); diff --git a/lib/kunit/try-catch.c b/lib/kunit/try-catch.c index 0dd434e40487..f677c2f2a51a 100644 --- a/lib/kunit/try-catch.c +++ b/lib/kunit/try-catch.c @@ -11,7 +11,8 @@ #include <linux/completion.h> #include <linux/kernel.h> #include <linux/kthread.h>
+#include <linux/sched/mm.h> +#include <linux/sched/task.h> #include "try-catch-impl.h"
void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch) @@ -24,8 +25,17 @@ EXPORT_SYMBOL_GPL(kunit_try_catch_throw); static int kunit_generic_run_threadfn_adapter(void *data) { struct kunit_try_catch *try_catch = data;
struct kunit *test = try_catch->test;if (test->mm != NULL)kthread_use_mm(try_catch->test->mm); try_catch->try(try_catch->context);if (try_catch->test->mm) {Here and below: You already have a pointer to test. You should use it.
if (test->mm != NULL)kthread_unuse_mm(try_catch->test->mm);try_catch->test->mm = NULL;} complete_and_exit(try_catch->try_completion, 0);} @@ -65,6 +75,9 @@ void kunit_try_catch_run(struct kunit_try_catch *try_catch, void *context) try_catch->context = context; try_catch->try_completion = &try_completion; try_catch->try_result = 0;
test->mm = get_task_mm(current);task_struct =kthread_run(kunit_generic_run_threadfn_adapter, try_catch, "kunit_try_catch_thread"); -- 2.26.2