initial_stack_frame 948 fs/btrfs/check-integrity.c struct btrfsic_stack_frame initial_stack_frame = { 0 }; initial_stack_frame 955 fs/btrfs/check-integrity.c sf = &initial_stack_frame; initial_stack_frame 1193 fs/btrfs/check-integrity.c BUG_ON(&initial_stack_frame != sf);