testsuite/test-weakdep: remove custom handling

Currently test-weakdep is the only test which explicitly sets the kernel
module lookup directory and the modprobe.d location. It does so by
explicitly hard-coding the full path for both, thus effectively
bypassing the path handling done in our `LD_PRELOAD` module `path.so`.

Just use `kmod_new(NULL, NULL);` which will ensure that everything is
handled relatively to `TC_ROOTFS` defined further down in the test.

Note: this technically reduces our test coverage, although kmod_new() is
not the goal of this test and should be handled separately.

Noticed while removing the TESTSUITE_ROOTFS instances from DEFINE_TEST()

Signed-off-by: Emil Velikov <[email protected]>
Link: #258
Signed-off-by: Lucas De Marchi <[email protected]>

testsuite/test-weakdep.c

@@ -15,14 +15,6 @@
 
 #include "testsuite.h"
 
-#define TEST_WEAKDEP_ROOTFS TESTSUITE_ROOTFS "test-weakdep/"
-#define TEST_WEAKDEP_KERNEL_DIR TEST_WEAKDEP_ROOTFS MODULE_DIRECTORY "/4.4.4/"
-
-static const char *const test_weakdep_config_paths[] = {
-	TEST_WEAKDEP_ROOTFS SYSCONFDIR "/modprobe.d",
-	NULL,
-};
-
 static const char *const mod_name[] = {
 	"mod-loop-b",
 	"mod-weakdep",
@@ -35,7 +27,7 @@ static int test_weakdep(const struct test *t)
 	int mod_name_index = 0;
 	int err;
 
-	ctx = kmod_new(TEST_WEAKDEP_KERNEL_DIR, test_weakdep_config_paths);
+	ctx = kmod_new(NULL, NULL);
 	if (ctx == NULL)
 		exit(EXIT_FAILURE);