if (!p)
if (unlikely(!p)) { hugetlbfs_inc_free_inodes(sbinfo);
static struct inode *hugetlbfs_alloc_inode(struct super_block *sb){	struct hugetlbfs_inode_info *p;	p = kmem_cache_alloc(hugetlbfs_inode_cachep, SLAB_KERNEL);	if (!p)		return NULL;	return &p->vfs_inode;}