layer_mount
#define MOUNTTOLAYERMOUNT(mp) ((struct layer_mount *)((mp)->mnt_data))
struct layer_mount *lmp = MOUNTTOLAYERMOUNT(mp);
struct layer_mount *lmp = MOUNTTOLAYERMOUNT(vp->v_mount);
struct layer_mount lm; /* generic layerfs mount stuff */
struct layer_mount *lmp;
struct layer_mount lm; /* generic layerfs mount stuff */
struct layer_mount *lmp;
struct layer_mount lm;