88 static inline bool subpool_is_free(struct hugepage_subpool *spool)  in subpool_is_free()  argument
90 	if (spool->count)  in subpool_is_free()
92 	if (spool->max_hpages != -1)  in subpool_is_free()
93 		return spool->used_hpages == 0;  in subpool_is_free()
94 	if (spool->min_hpages != -1)  in subpool_is_free()
95 		return spool->rsv_hpages == spool->min_hpages;  in subpool_is_free()
100 static inline void unlock_or_release_subpool(struct hugepage_subpool *spool,  in unlock_or_release_subpool()  argument
103 	spin_unlock_irqrestore(&spool->lock, irq_flags);  in unlock_or_release_subpool()
108 	if (subpool_is_free(spool)) {  in unlock_or_release_subpool()
109 		if (spool->min_hpages != -1)  in unlock_or_release_subpool()
110 			hugetlb_acct_memory(spool->hstate,  in unlock_or_release_subpool()
111 						-spool->min_hpages);  in unlock_or_release_subpool()
112 		kfree(spool);  in unlock_or_release_subpool()
119 	struct hugepage_subpool *spool;  in hugepage_new_subpool()  local
121 	spool = kzalloc(sizeof(*spool), GFP_KERNEL);  in hugepage_new_subpool()
122 	if (!spool)  in hugepage_new_subpool()
125 	spin_lock_init(&spool->lock);  in hugepage_new_subpool()
126 	spool->count = 1;  in hugepage_new_subpool()
127 	spool->max_hpages = max_hpages;  in hugepage_new_subpool()
128 	spool->hstate = h;  in hugepage_new_subpool()
129 	spool->min_hpages = min_hpages;  in hugepage_new_subpool()
132 		kfree(spool);  in hugepage_new_subpool()
135 	spool->rsv_hpages = min_hpages;  in hugepage_new_subpool()
137 	return spool;  in hugepage_new_subpool()
140 void hugepage_put_subpool(struct hugepage_subpool *spool)  in hugepage_put_subpool()  argument
144 	spin_lock_irqsave(&spool->lock, flags);  in hugepage_put_subpool()
145 	BUG_ON(!spool->count);  in hugepage_put_subpool()
146 	spool->count--;  in hugepage_put_subpool()
147 	unlock_or_release_subpool(spool, flags);  in hugepage_put_subpool()
158 static long hugepage_subpool_get_pages(struct hugepage_subpool *spool,  in hugepage_subpool_get_pages()  argument
163 	if (!spool)  in hugepage_subpool_get_pages()
166 	spin_lock_irq(&spool->lock);  in hugepage_subpool_get_pages()
168 	if (spool->max_hpages != -1) {		/* maximum size accounting */  in hugepage_subpool_get_pages()
169 		if ((spool->used_hpages + delta) <= spool->max_hpages)  in hugepage_subpool_get_pages()
170 			spool->used_hpages += delta;  in hugepage_subpool_get_pages()
178 	if (spool->min_hpages != -1 && spool->rsv_hpages) {  in hugepage_subpool_get_pages()
179 		if (delta > spool->rsv_hpages) {  in hugepage_subpool_get_pages()
184 			ret = delta - spool->rsv_hpages;  in hugepage_subpool_get_pages()
185 			spool->rsv_hpages = 0;  in hugepage_subpool_get_pages()
188 			spool->rsv_hpages -= delta;  in hugepage_subpool_get_pages()
193 	spin_unlock_irq(&spool->lock);  in hugepage_subpool_get_pages()
203 static long hugepage_subpool_put_pages(struct hugepage_subpool *spool,  in hugepage_subpool_put_pages()  argument
209 	if (!spool)  in hugepage_subpool_put_pages()
212 	spin_lock_irqsave(&spool->lock, flags);  in hugepage_subpool_put_pages()
214 	if (spool->max_hpages != -1)		/* maximum size accounting */  in hugepage_subpool_put_pages()
215 		spool->used_hpages -= delta;  in hugepage_subpool_put_pages()
218 	if (spool->min_hpages != -1 && spool->used_hpages < spool->min_hpages) {  in hugepage_subpool_put_pages()
219 		if (spool->rsv_hpages + delta <= spool->min_hpages)  in hugepage_subpool_put_pages()
222 			ret = spool->rsv_hpages + delta - spool->min_hpages;  in hugepage_subpool_put_pages()
224 		spool->rsv_hpages += delta;  in hugepage_subpool_put_pages()
225 		if (spool->rsv_hpages > spool->min_hpages)  in hugepage_subpool_put_pages()
226 			spool->rsv_hpages = spool->min_hpages;  in hugepage_subpool_put_pages()
233 	unlock_or_release_subpool(spool, flags);  in hugepage_subpool_put_pages()
240 	return HUGETLBFS_SB(inode->i_sb)->spool;  in subpool_inode()
750 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_fix_reserve_counts()  local
754 	rsv_adjust = hugepage_subpool_get_pages(spool, 1);  in hugetlb_fix_reserve_counts()
1585 	struct hugepage_subpool *spool = hugetlb_page_subpool(page);  in free_huge_page()  local
1612 		if (hugepage_subpool_put_pages(spool, 1) == 0)  in free_huge_page()
2746 	struct hugepage_subpool *spool = subpool_vma(vma);  in alloc_huge_page()  local
2773 		gbl_chg = hugepage_subpool_get_pages(spool, 1);  in alloc_huge_page()
2836 	hugetlb_set_page_subpool(page, spool);  in alloc_huge_page()
2851 		rsv_adjust = hugepage_subpool_put_pages(spool, 1);  in alloc_huge_page()
2867 		hugepage_subpool_put_pages(spool, 1);  in alloc_huge_page()
4140 	struct hugepage_subpool *spool = subpool_vma(vma);  in hugetlb_vm_op_close()  local
4157 		gbl_reserve = hugepage_subpool_put_pages(spool, reserve);  in hugetlb_vm_op_close()
5735 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_reserve_pages()  local
5801 	gbl_reserve = hugepage_subpool_get_pages(spool, chg);  in hugetlb_reserve_pages()
5847 			rsv_adjust = hugepage_subpool_put_pages(spool,  in hugetlb_reserve_pages()
5864 	(void)hugepage_subpool_put_pages(spool, chg);  in hugetlb_reserve_pages()
5886 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_unreserve_pages()  local
5915 	gbl_reserve = hugepage_subpool_put_pages(spool, (chg - freed));  in hugetlb_unreserve_pages()