102 static inline bool subpool_is_free(struct hugepage_subpool *spool)  in subpool_is_free()  argument
104 	if (spool->count)  in subpool_is_free()
106 	if (spool->max_hpages != -1)  in subpool_is_free()
107 		return spool->used_hpages == 0;  in subpool_is_free()
108 	if (spool->min_hpages != -1)  in subpool_is_free()
109 		return spool->rsv_hpages == spool->min_hpages;  in subpool_is_free()
114 static inline void unlock_or_release_subpool(struct hugepage_subpool *spool,  in unlock_or_release_subpool()  argument
117 	spin_unlock_irqrestore(&spool->lock, irq_flags);  in unlock_or_release_subpool()
122 	if (subpool_is_free(spool)) {  in unlock_or_release_subpool()
123 		if (spool->min_hpages != -1)  in unlock_or_release_subpool()
124 			hugetlb_acct_memory(spool->hstate,  in unlock_or_release_subpool()
125 						-spool->min_hpages);  in unlock_or_release_subpool()
126 		kfree(spool);  in unlock_or_release_subpool()
133 	struct hugepage_subpool *spool;  in hugepage_new_subpool()  local
135 	spool = kzalloc(sizeof(*spool), GFP_KERNEL);  in hugepage_new_subpool()
136 	if (!spool)  in hugepage_new_subpool()
139 	spin_lock_init(&spool->lock);  in hugepage_new_subpool()
140 	spool->count = 1;  in hugepage_new_subpool()
141 	spool->max_hpages = max_hpages;  in hugepage_new_subpool()
142 	spool->hstate = h;  in hugepage_new_subpool()
143 	spool->min_hpages = min_hpages;  in hugepage_new_subpool()
146 		kfree(spool);  in hugepage_new_subpool()
149 	spool->rsv_hpages = min_hpages;  in hugepage_new_subpool()
151 	return spool;  in hugepage_new_subpool()
154 void hugepage_put_subpool(struct hugepage_subpool *spool)  in hugepage_put_subpool()  argument
158 	spin_lock_irqsave(&spool->lock, flags);  in hugepage_put_subpool()
159 	BUG_ON(!spool->count);  in hugepage_put_subpool()
160 	spool->count--;  in hugepage_put_subpool()
161 	unlock_or_release_subpool(spool, flags);  in hugepage_put_subpool()
172 static long hugepage_subpool_get_pages(struct hugepage_subpool *spool,  in hugepage_subpool_get_pages()  argument
177 	if (!spool)  in hugepage_subpool_get_pages()
180 	spin_lock_irq(&spool->lock);  in hugepage_subpool_get_pages()
182 	if (spool->max_hpages != -1) {		/* maximum size accounting */  in hugepage_subpool_get_pages()
183 		if ((spool->used_hpages + delta) <= spool->max_hpages)  in hugepage_subpool_get_pages()
184 			spool->used_hpages += delta;  in hugepage_subpool_get_pages()
192 	if (spool->min_hpages != -1 && spool->rsv_hpages) {  in hugepage_subpool_get_pages()
193 		if (delta > spool->rsv_hpages) {  in hugepage_subpool_get_pages()
198 			ret = delta - spool->rsv_hpages;  in hugepage_subpool_get_pages()
199 			spool->rsv_hpages = 0;  in hugepage_subpool_get_pages()
202 			spool->rsv_hpages -= delta;  in hugepage_subpool_get_pages()
207 	spin_unlock_irq(&spool->lock);  in hugepage_subpool_get_pages()
217 static long hugepage_subpool_put_pages(struct hugepage_subpool *spool,  in hugepage_subpool_put_pages()  argument
223 	if (!spool)  in hugepage_subpool_put_pages()
226 	spin_lock_irqsave(&spool->lock, flags);  in hugepage_subpool_put_pages()
228 	if (spool->max_hpages != -1)		/* maximum size accounting */  in hugepage_subpool_put_pages()
229 		spool->used_hpages -= delta;  in hugepage_subpool_put_pages()
232 	if (spool->min_hpages != -1 && spool->used_hpages < spool->min_hpages) {  in hugepage_subpool_put_pages()
233 		if (spool->rsv_hpages + delta <= spool->min_hpages)  in hugepage_subpool_put_pages()
236 			ret = spool->rsv_hpages + delta - spool->min_hpages;  in hugepage_subpool_put_pages()
238 		spool->rsv_hpages += delta;  in hugepage_subpool_put_pages()
239 		if (spool->rsv_hpages > spool->min_hpages)  in hugepage_subpool_put_pages()
240 			spool->rsv_hpages = spool->min_hpages;  in hugepage_subpool_put_pages()
247 	unlock_or_release_subpool(spool, flags);  in hugepage_subpool_put_pages()
254 	return HUGETLBFS_SB(inode->i_sb)->spool;  in subpool_inode()
936 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_fix_reserve_counts()  local
940 	rsv_adjust = hugepage_subpool_get_pages(spool, 1);  in hugetlb_fix_reserve_counts()
1901 	struct hugepage_subpool *spool = hugetlb_folio_subpool(folio);  in free_huge_folio()  local
1930 		if (hugepage_subpool_put_pages(spool, 1) == 0)  in free_huge_folio()
3056 	struct hugepage_subpool *spool = subpool_vma(vma);  in alloc_hugetlb_folio()  local
3083 		gbl_chg = hugepage_subpool_get_pages(spool, 1);  in alloc_hugetlb_folio()
3148 	hugetlb_set_folio_subpool(folio, spool);  in alloc_hugetlb_folio()
3163 		rsv_adjust = hugepage_subpool_put_pages(spool, 1);  in alloc_hugetlb_folio()
3182 		hugepage_subpool_put_pages(spool, 1);  in alloc_hugetlb_folio()
4875 	struct hugepage_subpool *spool = subpool_vma(vma);  in hugetlb_vm_op_close()  local
4895 		gbl_reserve = hugepage_subpool_put_pages(spool, reserve);  in hugetlb_vm_op_close()
6716 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_reserve_pages()  local
6787 	gbl_reserve = hugepage_subpool_get_pages(spool, chg);  in hugetlb_reserve_pages()
6833 			rsv_adjust = hugepage_subpool_put_pages(spool,  in hugetlb_reserve_pages()
6850 	(void)hugepage_subpool_put_pages(spool, chg);  in hugetlb_reserve_pages()
6875 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_unreserve_pages()  local
6904 	gbl_reserve = hugepage_subpool_put_pages(spool, (chg - freed));  in hugetlb_unreserve_pages()