Most recent kernel where this bug did not occur: Distribution: Hardware Environment: Software Environment: Problem Description: Steps to reproduce: drivers/char/drm/drm_stub.c: In function 'drm_get_dev': drivers/char/drm/drm_stub.c:212: warning: ignoring return value of 'pci_enable_device', declared with attribute warn_unused_result CC [M] drivers/char/drm/drm_vm.o CC [M] drivers/char/drm/drm_agpsupport.o CC [M] drivers/char/drm/drm_scatter.o CC [M] drivers/char/drm/ati_pcigart.o CC [M] drivers/char/drm/drm_pci.o CC [M] drivers/char/drm/drm_sysfs.o drivers/char/drm/drm_sysfs.c: In function 'drm_sysfs_create': drivers/char/drm/drm_sysfs.c:50: warning: ignoring return value of 'class_create_file', declared with attribute warn_unused_result drivers/char/drm/drm_sysfs.c: In function 'drm_sysfs_device_add': drivers/char/drm/drm_sysfs.c:111: warning: ignoring return value of 'class_device_create_file', declared with attribute warn_unused_result
It's only a warning, not an error. And it doesn't make sense to open bugs for every single compile warning in the kernel.