The struct drm_mm is being allocated on the stack, which is causing the following -Wframe-larger-than warning on ARM:

../drivers/gpu/drm/tests/drm_mm_test.c:344:12: error: stack frame size (1064) exceeds limit (1024) in '__igt_reserve' [-Werror,-Wframe-larger-than]

static int __igt_reserve(struct kunit *test, unsigned int count, u64 size) ^ 1 error generated.

So, fix this warning by dynamically allocating the struct drm_mm.

Fixes: fc8d29e298cf ("drm: selftest: convert drm_mm selftest to KUnit") Reported-by: kernel test robot lkp@intel.com Signed-off-by: Maíra Canal mairacanal@riseup.net --- drivers/gpu/drm/tests/drm_mm_test.c | 33 ++++++++++++++++------------- 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/tests/drm_mm_test.c b/drivers/gpu/drm/tests/drm_mm_test.c index 1e2c1aa524bd..fbd8dcbc12ee 100644 --- a/drivers/gpu/drm/tests/drm_mm_test.c +++ b/drivers/gpu/drm/tests/drm_mm_test.c @@ -344,7 +344,7 @@ static bool check_reserve_boundaries(struct kunit *test, struct drm_mm *mm, static int __igt_reserve(struct kunit *test, unsigned int count, u64 size) { DRM_RND_STATE(prng, random_seed); - struct drm_mm mm; + struct drm_mm *mm; struct drm_mm_node tmp, *nodes, *node, *next; unsigned int *order, n, m, o = 0; int ret, err; @@ -366,17 +366,20 @@ static int __igt_reserve(struct kunit *test, unsigned int count, u64 size) nodes = vzalloc(array_size(count, sizeof(*nodes))); KUNIT_ASSERT_TRUE(test, nodes);

+ mm = kunit_kzalloc(test, sizeof(struct drm_mm), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, mm); + ret = -EINVAL; - drm_mm_init(&mm, 0, count * size); + drm_mm_init(mm, 0, count * size);

- if (!check_reserve_boundaries(test, &mm, count, size)) + if (!check_reserve_boundaries(test, mm, count, size)) goto out;

for (n = 0; n < count; n++) { nodes[n].start = order[n] * size; nodes[n].size = size;

- err = drm_mm_reserve_node(&mm, &nodes[n]); + err = drm_mm_reserve_node(mm, &nodes[n]); if (err) { KUNIT_FAIL(test, "reserve failed, step %d, start %llu\n", n, nodes[n].start); @@ -390,23 +393,23 @@ static int __igt_reserve(struct kunit *test, unsigned int count, u64 size) goto out; }

- if (!expect_reserve_fail(test, &mm, &nodes[n])) + if (!expect_reserve_fail(test, mm, &nodes[n])) goto out; }

/* After random insertion the nodes should be in order */ - if (!assert_continuous(test, &mm, size)) + if (!assert_continuous(test, mm, size)) goto out;

/* Repeated use should then fail */ drm_random_reorder(order, count, &prng); for (n = 0; n < count; n++) { - if (!expect_reserve_fail(test, &mm, set_node(&tmp, order[n] * size, 1))) + if (!expect_reserve_fail(test, mm, set_node(&tmp, order[n] * size, 1))) goto out;

/* Remove and reinsert should work */ drm_mm_remove_node(&nodes[order[n]]); - err = drm_mm_reserve_node(&mm, &nodes[order[n]]); + err = drm_mm_reserve_node(mm, &nodes[order[n]]); if (err) { KUNIT_FAIL(test, "reserve failed, step %d, start %llu\n", n, nodes[n].start); @@ -415,16 +418,16 @@ static int __igt_reserve(struct kunit *test, unsigned int count, u64 size) } }

- if (!assert_continuous(test, &mm, size)) + if (!assert_continuous(test, mm, size)) goto out;

/* Overlapping use should then fail */ for (n = 0; n < count; n++) { - if (!expect_reserve_fail(test, &mm, set_node(&tmp, 0, size * count))) + if (!expect_reserve_fail(test, mm, set_node(&tmp, 0, size * count))) goto out; } for (n = 0; n < count; n++) { - if (!expect_reserve_fail(test, &mm, set_node(&tmp, size * n, size * (count - n)))) + if (!expect_reserve_fail(test, mm, set_node(&tmp, size * n, size * (count - n)))) goto out; }

@@ -437,7 +440,7 @@ static int __igt_reserve(struct kunit *test, unsigned int count, u64 size)

for (m = 0; m < n; m++) { node = &nodes[order[(o + m) % count]]; - err = drm_mm_reserve_node(&mm, node); + err = drm_mm_reserve_node(mm, node); if (err) { KUNIT_FAIL(test, "reserve failed, step %d/%d, start %llu\n", m, n, node->start); @@ -448,15 +451,15 @@ static int __igt_reserve(struct kunit *test, unsigned int count, u64 size)

o += n;

- if (!assert_continuous(test, &mm, size)) + if (!assert_continuous(test, mm, size)) goto out; }

ret = 0; out: - drm_mm_for_each_node_safe(node, next, &mm) + drm_mm_for_each_node_safe(node, next, mm) drm_mm_remove_node(node); - drm_mm_takedown(&mm); + drm_mm_takedown(mm); vfree(nodes); kfree(order); err: