23 		struct z_erofs_deflate *strm;  in z_erofs_deflate_exit()  local
26 		strm = z_erofs_deflate_head;  in z_erofs_deflate_exit()
27 		if (!strm) {  in z_erofs_deflate_exit()
34 		while (strm) {  in z_erofs_deflate_exit()
35 			struct z_erofs_deflate *n = strm->next;  in z_erofs_deflate_exit()
37 			vfree(strm->z.workspace);  in z_erofs_deflate_exit()
38 			kfree(strm);  in z_erofs_deflate_exit()
40 			strm = n;  in z_erofs_deflate_exit()
53 		struct z_erofs_deflate *strm;  in z_erofs_deflate_init()  local
55 		strm = kzalloc(sizeof(*strm), GFP_KERNEL);  in z_erofs_deflate_init()
56 		if (!strm)  in z_erofs_deflate_init()
60 		strm->z.workspace = vmalloc(zlib_inflate_workspacesize());  in z_erofs_deflate_init()
61 		if (!strm->z.workspace) {  in z_erofs_deflate_init()
62 			kfree(strm);  in z_erofs_deflate_init()
67 		strm->next = z_erofs_deflate_head;  in z_erofs_deflate_init()
68 		z_erofs_deflate_head = strm;  in z_erofs_deflate_init()
106 	struct z_erofs_deflate *strm;  in z_erofs_deflate_decompress()  local
124 	strm = z_erofs_deflate_head;  in z_erofs_deflate_decompress()
125 	if (!strm) {  in z_erofs_deflate_decompress()
130 	z_erofs_deflate_head = strm->next;  in z_erofs_deflate_decompress()
136 	zerr = zlib_inflateInit2(&strm->z, -MAX_WBITS);  in z_erofs_deflate_decompress()
143 	strm->z.avail_in = min_t(u32, insz, PAGE_SIZE - rq->pageofs_in);  in z_erofs_deflate_decompress()
144 	insz -= strm->z.avail_in;  in z_erofs_deflate_decompress()
145 	strm->z.next_in = kin + rq->pageofs_in;  in z_erofs_deflate_decompress()
146 	strm->z.avail_out = 0;  in z_erofs_deflate_decompress()
149 		if (!strm->z.avail_out) {  in z_erofs_deflate_decompress()
158 			strm->z.avail_out = min_t(u32, outsz, PAGE_SIZE - pofs);  in z_erofs_deflate_decompress()
159 			outsz -= strm->z.avail_out;  in z_erofs_deflate_decompress()
167 			strm->z.next_out = kout + pofs;  in z_erofs_deflate_decompress()
171 		if (!strm->z.avail_in && insz) {  in z_erofs_deflate_decompress()
179 				j = strm->z.next_out - kout;  in z_erofs_deflate_decompress()
183 			strm->z.avail_in = min_t(u32, insz, PAGE_SIZE);  in z_erofs_deflate_decompress()
184 			insz -= strm->z.avail_in;  in z_erofs_deflate_decompress()
186 			strm->z.next_in = kin;  in z_erofs_deflate_decompress()
190 				strm->z.next_out = kout + j;  in z_erofs_deflate_decompress()
201 			memcpy(strm->bounce, strm->z.next_in, strm->z.avail_in);  in z_erofs_deflate_decompress()
202 			strm->z.next_in = strm->bounce;  in z_erofs_deflate_decompress()
221 		zerr = zlib_inflate(&strm->z, Z_SYNC_FLUSH);  in z_erofs_deflate_decompress()
222 		if (zerr != Z_OK || !(outsz + strm->z.avail_out)) {  in z_erofs_deflate_decompress()
234 	if (zlib_inflateEnd(&strm->z) != Z_OK && !err)  in z_erofs_deflate_decompress()
242 	strm->next = z_erofs_deflate_head;  in z_erofs_deflate_decompress()
243 	z_erofs_deflate_head = strm;  in z_erofs_deflate_decompress()