tmpfs_mem_avail
size_t tmpfs_mem_avail(void);
return (tmpfs_mem_avail() >= 1);
tmpfs_pages_avail_init = tmpfs_mem_avail();
if (tmpfs_mem_avail() < req_pages)
if (tmpfs_mem_avail() < TMPFS_PAGES_MINRESERVED)
sbp->f_blocks = used + tmpfs_mem_avail();