49 static int zcomp_strm_init(struct zcomp_strm *zstrm, struct zcomp *comp)  in zcomp_strm_init()  argument
51 	zstrm->tfm = crypto_alloc_comp(comp->name, 0, 0);  in zcomp_strm_init()
64 bool zcomp_available_algorithm(const char *comp)  in zcomp_available_algorithm()  argument
68 	i = sysfs_match_string(backends, comp);  in zcomp_available_algorithm()
79 	return crypto_has_comp(comp, 0, 0) == 1;  in zcomp_available_algorithm()
83 ssize_t zcomp_available_show(const char *comp, char *buf)  in zcomp_available_show()  argument
90 		if (!strcmp(comp, backends[i])) {  in zcomp_available_show()
104 	if (!known_algorithm && crypto_has_comp(comp, 0, 0) == 1)  in zcomp_available_show()
106 				"[%s] ", comp);  in zcomp_available_show()
112 struct zcomp_strm *zcomp_stream_get(struct zcomp *comp)  in zcomp_stream_get()  argument
114 	local_lock(&comp->stream->lock);  in zcomp_stream_get()
115 	return this_cpu_ptr(comp->stream);  in zcomp_stream_get()
118 void zcomp_stream_put(struct zcomp *comp)  in zcomp_stream_put()  argument
120 	local_unlock(&comp->stream->lock);  in zcomp_stream_put()
131 	 * comp algorithm `842' pads the compressed length to multiple of 8  in zcomp_compress()
159 	struct zcomp *comp = hlist_entry(node, struct zcomp, node);  in zcomp_cpu_up_prepare()  local
163 	zstrm = per_cpu_ptr(comp->stream, cpu);  in zcomp_cpu_up_prepare()
166 	ret = zcomp_strm_init(zstrm, comp);  in zcomp_cpu_up_prepare()
174 	struct zcomp *comp = hlist_entry(node, struct zcomp, node);  in zcomp_cpu_dead()  local
177 	zstrm = per_cpu_ptr(comp->stream, cpu);  in zcomp_cpu_dead()
182 static int zcomp_init(struct zcomp *comp)  in zcomp_init()  argument
186 	comp->stream = alloc_percpu(struct zcomp_strm);  in zcomp_init()
187 	if (!comp->stream)  in zcomp_init()
190 	ret = cpuhp_state_add_instance(CPUHP_ZCOMP_PREPARE, &comp->node);  in zcomp_init()
196 	free_percpu(comp->stream);  in zcomp_init()
200 void zcomp_destroy(struct zcomp *comp)  in zcomp_destroy()  argument
202 	cpuhp_state_remove_instance(CPUHP_ZCOMP_PREPARE, &comp->node);  in zcomp_destroy()
203 	free_percpu(comp->stream);  in zcomp_destroy()
204 	kfree(comp);  in zcomp_destroy()
217 	struct zcomp *comp;  in zcomp_create()  local
223 	comp = kzalloc(sizeof(struct zcomp), GFP_KERNEL);  in zcomp_create()
224 	if (!comp)  in zcomp_create()
227 	comp->name = compress;  in zcomp_create()
228 	error = zcomp_init(comp);  in zcomp_create()
230 		kfree(comp);  in zcomp_create()
233 	return comp;  in zcomp_create()