pfnmap_track_ctx
struct pfnmap_track_ctx *pfnmap_track_ctx;
static inline struct pfnmap_track_ctx *pfnmap_track_ctx_alloc(unsigned long pfn,
struct pfnmap_track_ctx *ctx;
struct pfnmap_track_ctx *ctx = container_of(ref, struct pfnmap_track_ctx, kref);
struct pfnmap_track_ctx *ctx = NULL;
if (vma->pfnmap_track_ctx)
vma->pfnmap_track_ctx = ctx;
struct pfnmap_track_ctx *ctx = vma->pfnmap_track_ctx;
vma->pfnmap_track_ctx = NULL;
dest->pfnmap_track_ctx = NULL;
struct pfnmap_track_ctx *ctx = orig->pfnmap_track_ctx;
new->pfnmap_track_ctx = ctx;