torvalds/linux
3
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-04-14 10:19:08 +08:00
Code Issues Packages Projects Releases Wiki Activity

drm/tests: reduce drm_mm_test stack usage

Browse Source 
The check_reserve_boundaries function uses a lot of kernel stack,
and it gets inlined by clang, which makes __drm_test_mm_reserve
use even more of it, to the point of hitting the warning limit:

drivers/gpu/drm/tests/drm_mm_test.c:344:12: error: stack frame size (1048) exceeds limit (1024) in '__drm_test_mm_reserve' [-Werror,-Wframe-larger-than]

When building with gcc, this does not happen, but the structleak
plugin can similarly increase the stack usage and needs to be
disabled, as we do for all other kunit users.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20221215163511.266214-1-arnd@kernel.org
This commit is contained in:
Arnd Bergmann
2022-12-15 17:34:49 +01:00
committed by Maíra Canal
parent b02897e56b
commit 523dfa96ad
2 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/tests/Makefile
View File

@@ -12,3 +12,5 @@ obj-$(CONFIG_DRM_KUNIT_TEST) += \
drm_mm_test.o \
drm_plane_helper_test.o \
drm_rect_test.o
CFLAGS_drm_mm_test.o := $(DISABLE_STRUCTLEAK_PLUGIN)

6
drivers/gpu/drm/tests/drm_mm_test.c
View File

@@ -298,9 +298,9 @@ static bool expect_reserve_fail(struct kunit *test, struct drm_mm *mm, struct dr
return false;
}
static bool check_reserve_boundaries(struct kunit *test, struct drm_mm *mm,
unsigned int count,
u64 size)
static bool noinline_for_stack check_reserve_boundaries(struct kunit *test, struct drm_mm *mm,
unsigned int count,
u64 size)
{
const struct boundary {
u64 start, size;