shmem_uncharge    114 include/linux/shmem_fs.h extern void shmem_uncharge(struct inode *inode, long pages);
shmem_uncharge   2528 mm/huge_memory.c 				shmem_uncharge(head->mapping->host, 1);
shmem_uncharge   1775 mm/khugepaged.c 			shmem_uncharge(mapping->host, nr_none);