gallium (iris) depends on os_same_file_description() to disambiguate screens and so avoid importing the same screen fd twice as two distinct entities (that share all the kernel resources, so actions on screen affect the other and would cause random faiure). As they depend on it, so must we. os_same_file_description() uses SYS_kcmp to check the file tables for the equivalent struct file, but SYS_kcmp is hidden behind CONFIG_CHECKPOINT_RESTORE. As this is not default, we must select it for ourselves to ensure that our userspace is fully supported.
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3046 Signed-off-by: Chris Wilson chris@chris-wilson.co.uk Cc: Jani Nikula jani.nikula@intel.com Cc: Daniel Vetter daniel.vetter@ffwll.ch --- drivers/gpu/drm/i915/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig index 1e1cb245fca7..470a5214bd33 100644 --- a/drivers/gpu/drm/i915/Kconfig +++ b/drivers/gpu/drm/i915/Kconfig @@ -21,6 +21,7 @@ config DRM_I915 select ACPI_VIDEO if ACPI select ACPI_BUTTON if ACPI select SYNC_FILE + select CHECKPOINT_RESTORE # gallium depends on SYS_kcmp select IOSF_MBI select CRC32 select SND_HDA_I915 if SND_HDA_CORE