Variable mm/slab_common.c, line 31 [usage...] Extern or forward variable declaration fs/freevxfs/vxfs_extern.h, line 41 [usage...] include/linux/kasan.h, line 6 [usage...] include/linux/memcontrol.h, line 35 [usage...] include/linux/mempool.h, line 9 [usage...] mm/slab.h, line 67 [usage...] tools/include/linux/types.h, line 12 [usage...] Structure include/linux/slab_def.h, line 10 [usage...] include/linux/slub_def.h, line 62 [usage...] mm/slab.h, line 19 [usage...]