152 static int gs_buf_alloc(struct gs_buf *gb, unsigned size)  in gs_buf_alloc()  argument
154 	gb->buf_buf = kmalloc(size, GFP_KERNEL);  in gs_buf_alloc()
155 	if (gb->buf_buf == NULL)  in gs_buf_alloc()
158 	gb->buf_size = size;  in gs_buf_alloc()
159 	gb->buf_put = gb->buf_buf;  in gs_buf_alloc()
160 	gb->buf_get = gb->buf_buf;  in gs_buf_alloc()
170 static void gs_buf_free(struct gs_buf *gb)  in gs_buf_free()  argument
172 	kfree(gb->buf_buf);  in gs_buf_free()
173 	gb->buf_buf = NULL;  in gs_buf_free()
181 static void gs_buf_clear(struct gs_buf *gb)  in gs_buf_clear()  argument
183 	gb->buf_get = gb->buf_put;  in gs_buf_clear()
193 static unsigned gs_buf_data_avail(struct gs_buf *gb)  in gs_buf_data_avail()  argument
195 	return (gb->buf_size + gb->buf_put - gb->buf_get) % gb->buf_size;  in gs_buf_data_avail()
204 static unsigned gs_buf_space_avail(struct gs_buf *gb)  in gs_buf_space_avail()  argument
206 	return (gb->buf_size + gb->buf_get - gb->buf_put - 1) % gb->buf_size;  in gs_buf_space_avail()
218 gs_buf_put(struct gs_buf *gb, const char *buf, unsigned count)  in gs_buf_put()  argument
222 	len  = gs_buf_space_avail(gb);  in gs_buf_put()
229 	len = gb->buf_buf + gb->buf_size - gb->buf_put;  in gs_buf_put()
231 		memcpy(gb->buf_put, buf, len);  in gs_buf_put()
232 		memcpy(gb->buf_buf, buf+len, count - len);  in gs_buf_put()
233 		gb->buf_put = gb->buf_buf + count - len;  in gs_buf_put()
235 		memcpy(gb->buf_put, buf, count);  in gs_buf_put()
237 			gb->buf_put += count;  in gs_buf_put()
239 			gb->buf_put = gb->buf_buf;  in gs_buf_put()
254 gs_buf_get(struct gs_buf *gb, char *buf, unsigned count)  in gs_buf_get()  argument
258 	len = gs_buf_data_avail(gb);  in gs_buf_get()
265 	len = gb->buf_buf + gb->buf_size - gb->buf_get;  in gs_buf_get()
267 		memcpy(buf, gb->buf_get, len);  in gs_buf_get()
268 		memcpy(buf+len, gb->buf_buf, count - len);  in gs_buf_get()
269 		gb->buf_get = gb->buf_buf + count - len;  in gs_buf_get()
271 		memcpy(buf, gb->buf_get, count);  in gs_buf_get()
273 			gb->buf_get += count;  in gs_buf_get()
275 			gb->buf_get = gb->buf_buf;  in gs_buf_get()