104 static inline bool subpool_is_free(struct hugepage_subpool *spool)  in subpool_is_free()  argument
106 	if (spool->count)  in subpool_is_free()
108 	if (spool->max_hpages != -1)  in subpool_is_free()
109 		return spool->used_hpages == 0;  in subpool_is_free()
110 	if (spool->min_hpages != -1)  in subpool_is_free()
111 		return spool->rsv_hpages == spool->min_hpages;  in subpool_is_free()
116 static inline void unlock_or_release_subpool(struct hugepage_subpool *spool,  in unlock_or_release_subpool()  argument
119 	spin_unlock_irqrestore(&spool->lock, irq_flags);  in unlock_or_release_subpool()
124 	if (subpool_is_free(spool)) {  in unlock_or_release_subpool()
125 		if (spool->min_hpages != -1)  in unlock_or_release_subpool()
126 			hugetlb_acct_memory(spool->hstate,  in unlock_or_release_subpool()
127 						-spool->min_hpages);  in unlock_or_release_subpool()
128 		kfree(spool);  in unlock_or_release_subpool()
135 	struct hugepage_subpool *spool;  in hugepage_new_subpool()  local
137 	spool = kzalloc(sizeof(*spool), GFP_KERNEL);  in hugepage_new_subpool()
138 	if (!spool)  in hugepage_new_subpool()
141 	spin_lock_init(&spool->lock);  in hugepage_new_subpool()
142 	spool->count = 1;  in hugepage_new_subpool()
143 	spool->max_hpages = max_hpages;  in hugepage_new_subpool()
144 	spool->hstate = h;  in hugepage_new_subpool()
145 	spool->min_hpages = min_hpages;  in hugepage_new_subpool()
148 		kfree(spool);  in hugepage_new_subpool()
151 	spool->rsv_hpages = min_hpages;  in hugepage_new_subpool()
153 	return spool;  in hugepage_new_subpool()
156 void hugepage_put_subpool(struct hugepage_subpool *spool)  in hugepage_put_subpool()  argument
160 	spin_lock_irqsave(&spool->lock, flags);  in hugepage_put_subpool()
161 	BUG_ON(!spool->count);  in hugepage_put_subpool()
162 	spool->count--;  in hugepage_put_subpool()
163 	unlock_or_release_subpool(spool, flags);  in hugepage_put_subpool()
174 static long hugepage_subpool_get_pages(struct hugepage_subpool *spool,  in hugepage_subpool_get_pages()  argument
179 	if (!spool)  in hugepage_subpool_get_pages()
182 	spin_lock_irq(&spool->lock);  in hugepage_subpool_get_pages()
184 	if (spool->max_hpages != -1) {		/* maximum size accounting */  in hugepage_subpool_get_pages()
185 		if ((spool->used_hpages + delta) <= spool->max_hpages)  in hugepage_subpool_get_pages()
186 			spool->used_hpages += delta;  in hugepage_subpool_get_pages()
194 	if (spool->min_hpages != -1 && spool->rsv_hpages) {  in hugepage_subpool_get_pages()
195 		if (delta > spool->rsv_hpages) {  in hugepage_subpool_get_pages()
200 			ret = delta - spool->rsv_hpages;  in hugepage_subpool_get_pages()
201 			spool->rsv_hpages = 0;  in hugepage_subpool_get_pages()
204 			spool->rsv_hpages -= delta;  in hugepage_subpool_get_pages()
209 	spin_unlock_irq(&spool->lock);  in hugepage_subpool_get_pages()
219 static long hugepage_subpool_put_pages(struct hugepage_subpool *spool,  in hugepage_subpool_put_pages()  argument
225 	if (!spool)  in hugepage_subpool_put_pages()
228 	spin_lock_irqsave(&spool->lock, flags);  in hugepage_subpool_put_pages()
230 	if (spool->max_hpages != -1)		/* maximum size accounting */  in hugepage_subpool_put_pages()
231 		spool->used_hpages -= delta;  in hugepage_subpool_put_pages()
234 	if (spool->min_hpages != -1 && spool->used_hpages < spool->min_hpages) {  in hugepage_subpool_put_pages()
235 		if (spool->rsv_hpages + delta <= spool->min_hpages)  in hugepage_subpool_put_pages()
238 			ret = spool->rsv_hpages + delta - spool->min_hpages;  in hugepage_subpool_put_pages()
240 		spool->rsv_hpages += delta;  in hugepage_subpool_put_pages()
241 		if (spool->rsv_hpages > spool->min_hpages)  in hugepage_subpool_put_pages()
242 			spool->rsv_hpages = spool->min_hpages;  in hugepage_subpool_put_pages()
249 	unlock_or_release_subpool(spool, flags);  in hugepage_subpool_put_pages()
256 	return HUGETLBFS_SB(inode->i_sb)->spool;  in subpool_inode()
938 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_fix_reserve_counts()  local
942 	rsv_adjust = hugepage_subpool_get_pages(spool, 1);  in hugetlb_fix_reserve_counts()
1889 	struct hugepage_subpool *spool = hugetlb_folio_subpool(folio);  in free_huge_folio()  local
1918 		if (hugepage_subpool_put_pages(spool, 1) == 0)  in free_huge_folio()
2966 	struct hugepage_subpool *spool = subpool_vma(vma);  in alloc_hugetlb_folio()  local
3006 		gbl_chg = hugepage_subpool_get_pages(spool, 1);  in alloc_hugetlb_folio()
3069 	hugetlb_set_folio_subpool(folio, spool);  in alloc_hugetlb_folio()
3084 		rsv_adjust = hugepage_subpool_put_pages(spool, 1);  in alloc_hugetlb_folio()
3108 		hugepage_subpool_put_pages(spool, 1);  in alloc_hugetlb_folio()
5051 	struct hugepage_subpool *spool = subpool_vma(vma);  in hugetlb_vm_op_close()  local
5071 		gbl_reserve = hugepage_subpool_put_pages(spool, reserve);  in hugetlb_vm_op_close()
6903 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_reserve_pages()  local
6974 	gbl_reserve = hugepage_subpool_get_pages(spool, chg);  in hugetlb_reserve_pages()
7020 			rsv_adjust = hugepage_subpool_put_pages(spool,  in hugetlb_reserve_pages()
7037 	(void)hugepage_subpool_put_pages(spool, chg);  in hugetlb_reserve_pages()
7062 	struct hugepage_subpool *spool = subpool_inode(inode);  in hugetlb_unreserve_pages()  local
7091 	gbl_reserve = hugepage_subpool_put_pages(spool, (chg - freed));  in hugetlb_unreserve_pages()