shmem_kernel_file_setup
xf->file = shmem_kernel_file_setup(description, isize,
file = shmem_kernel_file_setup(descr, 0, EMPTY_VMA_FLAGS);
struct file *shmem_kernel_file_setup(const char *name, loff_t size, vma_flags_t vma_flags);
file = shmem_kernel_file_setup(name, size, acctflag);
EXPORT_SYMBOL_GPL(shmem_kernel_file_setup);
return shmem_kernel_file_setup("dev/zero", size, flags);
file = shmem_kernel_file_setup("", enclen, EMPTY_VMA_FLAGS);