Clang warns on certain 32-bit architectures:
drivers/gpu/drm/selftests/test-drm_plane_helper.c:76:5: warning: stack frame size (1064) exceeds limit (1024) in 'igt_check_plane_state' [-Wframe-larger-than]
int igt_check_plane_state(void *ignored)
^
1 warning generated.
The structures in igt_check_plane_state() total 1008 bytes, so any small
amount of inlining will cause the stack frame to exceed the 32-bit limit
of 1024, triggering the warning.
Move these structures to static storage, which dramatically reduces the
amount of stack space in igt_check_plane_state(). There is no testing
impact, as igt_check_plane_state() is only called once in the driver.
Fixes: 943e6a8beeac ("mock a drm_plane in igt_check_plane_state to make the test more robust")
Link: https://github.com/ClangBuiltLinux/linux/issues/1600
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220302235909.784935-1-nathan@kernel.org
{
int ret;
- const struct drm_crtc_state crtc_state = {
+ static const struct drm_crtc_state crtc_state = {
.crtc = ZERO_SIZE_PTR,
.enable = true,
.active = true,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
},
};
- struct drm_plane plane = {
+ static struct drm_plane plane = {
.dev = NULL
};
- struct drm_framebuffer fb = {
+ static struct drm_framebuffer fb = {
.width = 2048,
.height = 2048
};
- struct drm_plane_state plane_state = {
+ static struct drm_plane_state plane_state = {
.plane = &plane,
.crtc = ZERO_SIZE_PTR,
.fb = &fb,