13 struct pstack {  struct
19 struct pstack *pstack__new(unsigned short max_nr_entries)  in pstack__new()  argument
21 	struct pstack *pstack = zalloc((sizeof(*pstack) +  in pstack__new()  local
23 	if (pstack != NULL)  in pstack__new()
24 		pstack->max_nr_entries = max_nr_entries;  in pstack__new()
25 	return pstack;  in pstack__new()
28 void pstack__delete(struct pstack *pstack)  in pstack__delete()  argument
30 	free(pstack);  in pstack__delete()
33 bool pstack__empty(const struct pstack *pstack)  in pstack__empty()  argument
35 	return pstack->top == 0;  in pstack__empty()
38 void pstack__remove(struct pstack *pstack, void *key)  in pstack__remove()  argument
40 	unsigned short i = pstack->top, last_index = pstack->top - 1;  in pstack__remove()
43 		if (pstack->entries[i] == key) {  in pstack__remove()
45 				memmove(pstack->entries + i,  in pstack__remove()
46 					pstack->entries + i + 1,  in pstack__remove()
48 			--pstack->top;  in pstack__remove()
55 void pstack__push(struct pstack *pstack, void *key)  in pstack__push()  argument
57 	if (pstack->top == pstack->max_nr_entries) {  in pstack__push()
58 		pr_err("%s: top=%d, overflow!\n", __func__, pstack->top);  in pstack__push()
61 	pstack->entries[pstack->top++] = key;  in pstack__push()
64 void *pstack__pop(struct pstack *pstack)  in pstack__pop()  argument
68 	if (pstack->top == 0) {  in pstack__pop()
73 	ret = pstack->entries[--pstack->top];  in pstack__pop()
74 	pstack->entries[pstack->top] = NULL;  in pstack__pop()
78 void *pstack__peek(struct pstack *pstack)  in pstack__peek()  argument
80 	if (pstack->top == 0)  in pstack__peek()
82 	return pstack->entries[pstack->top - 1];  in pstack__peek()