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staging: rtl8188eu: rename HalSetBrateCfg() - style
[linux/fpc-iii.git] / drivers / mtd / tests / oobtest.c
blob766b2c38568240ceb8505c52ea049f4543a581fc
1 /*
2 * Copyright (C) 2006-2008 Nokia Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; see the file COPYING. If not, write to the Free Software
15 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
16 *
17 * Test OOB read and write on MTD device.
18 *
19 * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
20 */
21
22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24 #include <asm/div64.h>
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/err.h>
29 #include <linux/mtd/mtd.h>
30 #include <linux/slab.h>
31 #include <linux/sched.h>
32 #include <linux/random.h>
33
34 #include "mtd_test.h"
35
36 static int dev = -EINVAL;
37 static int bitflip_limit;
38 module_param(dev, int, S_IRUGO);
39 MODULE_PARM_DESC(dev, "MTD device number to use");
40 module_param(bitflip_limit, int, S_IRUGO);
41 MODULE_PARM_DESC(bitflip_limit, "Max. allowed bitflips per page");
42
43 static struct mtd_info *mtd;
44 static unsigned char *readbuf;
45 static unsigned char *writebuf;
46 static unsigned char *bbt;
47
48 static int ebcnt;
49 static int pgcnt;
50 static int errcnt;
51 static int use_offset;
52 static int use_len;
53 static int use_len_max;
54 static int vary_offset;
55 static struct rnd_state rnd_state;
56
57 static void do_vary_offset(void)
58 {
59 use_len -= 1;
60 if (use_len < 1) {
61 use_offset += 1;
62 if (use_offset >= use_len_max)
63 use_offset = 0;
64 use_len = use_len_max - use_offset;
65 }
66 }
67
68 static int write_eraseblock(int ebnum)
69 {
70 int i;
71 struct mtd_oob_ops ops;
72 int err = 0;
73 loff_t addr = (loff_t)ebnum * mtd->erasesize;
74
75 prandom_bytes_state(&rnd_state, writebuf, use_len_max * pgcnt);
76 for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
77 ops.mode = MTD_OPS_AUTO_OOB;
78 ops.len = 0;
79 ops.retlen = 0;
80 ops.ooblen = use_len;
81 ops.oobretlen = 0;
82 ops.ooboffs = use_offset;
83 ops.datbuf = NULL;
84 ops.oobbuf = writebuf + (use_len_max * i) + use_offset;
85 err = mtd_write_oob(mtd, addr, &ops);
86 if (err || ops.oobretlen != use_len) {
87 pr_err("error: writeoob failed at %#llx\n",
88 (long long)addr);
89 pr_err("error: use_len %d, use_offset %d\n",
90 use_len, use_offset);
91 errcnt += 1;
92 return err ? err : -1;
93 }
94 if (vary_offset)
95 do_vary_offset();
96 }
97
98 return err;
99 }
100
101 static int write_whole_device(void)
102 {
103 int err;
104 unsigned int i;
105
106 pr_info("writing OOBs of whole device\n");
107 for (i = 0; i < ebcnt; ++i) {
108 if (bbt[i])
109 continue;
110 err = write_eraseblock(i);
111 if (err)
112 return err;
113 if (i % 256 == 0)
114 pr_info("written up to eraseblock %u\n", i);
115
116 err = mtdtest_relax();
117 if (err)
118 return err;
119 }
120 pr_info("written %u eraseblocks\n", i);
121 return 0;
122 }
123
124 /*
125 * Display the address, offset and data bytes at comparison failure.
126 * Return number of bitflips encountered.
127 */
128 static size_t memcmpshowoffset(loff_t addr, loff_t offset, const void *cs,
129 const void *ct, size_t count)
130 {
131 const unsigned char *su1, *su2;
132 int res;
133 size_t i = 0;
134 size_t bitflips = 0;
135
136 for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--, i++) {
137 res = *su1 ^ *su2;
138 if (res) {
139 pr_info("error @addr[0x%lx:0x%lx] 0x%x -> 0x%x diff 0x%x\n",
140 (unsigned long)addr, (unsigned long)offset + i,
141 *su1, *su2, res);
142 bitflips += hweight8(res);
143 }
144 }
145
146 return bitflips;
147 }
148
149 #define memcmpshow(addr, cs, ct, count) memcmpshowoffset((addr), 0, (cs), (ct),\
150 (count))
151
152 /*
153 * Compare with 0xff and show the address, offset and data bytes at
154 * comparison failure. Return number of bitflips encountered.
155 */
156 static size_t memffshow(loff_t addr, loff_t offset, const void *cs,
157 size_t count)
158 {
159 const unsigned char *su1;
160 int res;
161 size_t i = 0;
162 size_t bitflips = 0;
163
164 for (su1 = cs; 0 < count; ++su1, count--, i++) {
165 res = *su1 ^ 0xff;
166 if (res) {
167 pr_info("error @addr[0x%lx:0x%lx] 0x%x -> 0xff diff 0x%x\n",
168 (unsigned long)addr, (unsigned long)offset + i,
169 *su1, res);
170 bitflips += hweight8(res);
171 }
172 }
173
174 return bitflips;
175 }
176
177 static int verify_eraseblock(int ebnum)
178 {
179 int i;
180 struct mtd_oob_ops ops;
181 int err = 0;
182 loff_t addr = (loff_t)ebnum * mtd->erasesize;
183 size_t bitflips;
184
185 prandom_bytes_state(&rnd_state, writebuf, use_len_max * pgcnt);
186 for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
187 ops.mode = MTD_OPS_AUTO_OOB;
188 ops.len = 0;
189 ops.retlen = 0;
190 ops.ooblen = use_len;
191 ops.oobretlen = 0;
192 ops.ooboffs = use_offset;
193 ops.datbuf = NULL;
194 ops.oobbuf = readbuf;
195 err = mtd_read_oob(mtd, addr, &ops);
196 if (mtd_is_bitflip(err))
197 err = 0;
198
199 if (err || ops.oobretlen != use_len) {
200 pr_err("error: readoob failed at %#llx\n",
201 (long long)addr);
202 errcnt += 1;
203 return err ? err : -1;
204 }
205
206 bitflips = memcmpshow(addr, readbuf,
207 writebuf + (use_len_max * i) + use_offset,
208 use_len);
209 if (bitflips > bitflip_limit) {
210 pr_err("error: verify failed at %#llx\n",
211 (long long)addr);
212 errcnt += 1;
213 if (errcnt > 1000) {
214 pr_err("error: too many errors\n");
215 return -1;
216 }
217 } else if (bitflips) {
218 pr_info("ignoring error as within bitflip_limit\n");
219 }
220
221 if (use_offset != 0 || use_len < mtd->oobavail) {
222 int k;
223
224 ops.mode = MTD_OPS_AUTO_OOB;
225 ops.len = 0;
226 ops.retlen = 0;
227 ops.ooblen = mtd->oobavail;
228 ops.oobretlen = 0;
229 ops.ooboffs = 0;
230 ops.datbuf = NULL;
231 ops.oobbuf = readbuf;
232 err = mtd_read_oob(mtd, addr, &ops);
233 if (mtd_is_bitflip(err))
234 err = 0;
235
236 if (err || ops.oobretlen != mtd->oobavail) {
237 pr_err("error: readoob failed at %#llx\n",
238 (long long)addr);
239 errcnt += 1;
240 return err ? err : -1;
241 }
242 bitflips = memcmpshowoffset(addr, use_offset,
243 readbuf + use_offset,
244 writebuf + (use_len_max * i) + use_offset,
245 use_len);
246
247 /* verify pre-offset area for 0xff */
248 bitflips += memffshow(addr, 0, readbuf, use_offset);
249
250 /* verify post-(use_offset + use_len) area for 0xff */
251 k = use_offset + use_len;
252 bitflips += memffshow(addr, k, readbuf + k,
253 mtd->oobavail - k);
254
255 if (bitflips > bitflip_limit) {
256 pr_err("error: verify failed at %#llx\n",
257 (long long)addr);
258 errcnt += 1;
259 if (errcnt > 1000) {
260 pr_err("error: too many errors\n");
261 return -1;
262 }
263 } else if (bitflips) {
264 pr_info("ignoring errors as within bitflip limit\n");
265 }
266 }
267 if (vary_offset)
268 do_vary_offset();
269 }
270 return err;
271 }
272
273 static int verify_eraseblock_in_one_go(int ebnum)
274 {
275 struct mtd_oob_ops ops;
276 int err = 0;
277 loff_t addr = (loff_t)ebnum * mtd->erasesize;
278 size_t len = mtd->oobavail * pgcnt;
279 size_t oobavail = mtd->oobavail;
280 size_t bitflips;
281 int i;
282
283 prandom_bytes_state(&rnd_state, writebuf, len);
284 ops.mode = MTD_OPS_AUTO_OOB;
285 ops.len = 0;
286 ops.retlen = 0;
287 ops.ooblen = len;
288 ops.oobretlen = 0;
289 ops.ooboffs = 0;
290 ops.datbuf = NULL;
291 ops.oobbuf = readbuf;
292
293 /* read entire block's OOB at one go */
294 err = mtd_read_oob(mtd, addr, &ops);
295 if (mtd_is_bitflip(err))
296 err = 0;
297
298 if (err || ops.oobretlen != len) {
299 pr_err("error: readoob failed at %#llx\n",
300 (long long)addr);
301 errcnt += 1;
302 return err ? err : -1;
303 }
304
305 /* verify one page OOB at a time for bitflip per page limit check */
306 for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
307 bitflips = memcmpshow(addr, readbuf + (i * oobavail),
308 writebuf + (i * oobavail), oobavail);
309 if (bitflips > bitflip_limit) {
310 pr_err("error: verify failed at %#llx\n",
311 (long long)addr);
312 errcnt += 1;
313 if (errcnt > 1000) {
314 pr_err("error: too many errors\n");
315 return -1;
316 }
317 } else if (bitflips) {
318 pr_info("ignoring error as within bitflip_limit\n");
319 }
320 }
321
322 return err;
323 }
324
325 static int verify_all_eraseblocks(void)
326 {
327 int err;
328 unsigned int i;
329
330 pr_info("verifying all eraseblocks\n");
331 for (i = 0; i < ebcnt; ++i) {
332 if (bbt[i])
333 continue;
334 err = verify_eraseblock(i);
335 if (err)
336 return err;
337 if (i % 256 == 0)
338 pr_info("verified up to eraseblock %u\n", i);
339
340 err = mtdtest_relax();
341 if (err)
342 return err;
343 }
344 pr_info("verified %u eraseblocks\n", i);
345 return 0;
346 }
347
348 static int __init mtd_oobtest_init(void)
349 {
350 int err = 0;
351 unsigned int i;
352 uint64_t tmp;
353 struct mtd_oob_ops ops;
354 loff_t addr = 0, addr0;
355
356 printk(KERN_INFO "\n");
357 printk(KERN_INFO "=================================================\n");
358
359 if (dev < 0) {
360 pr_info("Please specify a valid mtd-device via module parameter\n");
361 pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
362 return -EINVAL;
363 }
364
365 pr_info("MTD device: %d\n", dev);
366
367 mtd = get_mtd_device(NULL, dev);
368 if (IS_ERR(mtd)) {
369 err = PTR_ERR(mtd);
370 pr_err("error: cannot get MTD device\n");
371 return err;
372 }
373
374 if (!mtd_type_is_nand(mtd)) {
375 pr_info("this test requires NAND flash\n");
376 goto out;
377 }
378
379 tmp = mtd->size;
380 do_div(tmp, mtd->erasesize);
381 ebcnt = tmp;
382 pgcnt = mtd->erasesize / mtd->writesize;
383
384 pr_info("MTD device size %llu, eraseblock size %u, "
385 "page size %u, count of eraseblocks %u, pages per "
386 "eraseblock %u, OOB size %u\n",
387 (unsigned long long)mtd->size, mtd->erasesize,
388 mtd->writesize, ebcnt, pgcnt, mtd->oobsize);
389
390 err = -ENOMEM;
391 readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);
392 if (!readbuf)
393 goto out;
394 writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
395 if (!writebuf)
396 goto out;
397 bbt = kzalloc(ebcnt, GFP_KERNEL);
398 if (!bbt)
399 goto out;
400
401 err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt);
402 if (err)
403 goto out;
404
405 use_offset = 0;
406 use_len = mtd->oobavail;
407 use_len_max = mtd->oobavail;
408 vary_offset = 0;
409
410 /* First test: write all OOB, read it back and verify */
411 pr_info("test 1 of 5\n");
412
413 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
414 if (err)
415 goto out;
416
417 prandom_seed_state(&rnd_state, 1);
418 err = write_whole_device();
419 if (err)
420 goto out;
421
422 prandom_seed_state(&rnd_state, 1);
423 err = verify_all_eraseblocks();
424 if (err)
425 goto out;
426
427 /*
428 * Second test: write all OOB, a block at a time, read it back and
429 * verify.
430 */
431 pr_info("test 2 of 5\n");
432
433 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
434 if (err)
435 goto out;
436
437 prandom_seed_state(&rnd_state, 3);
438 err = write_whole_device();
439 if (err)
440 goto out;
441
442 /* Check all eraseblocks */
443 prandom_seed_state(&rnd_state, 3);
444 pr_info("verifying all eraseblocks\n");
445 for (i = 0; i < ebcnt; ++i) {
446 if (bbt[i])
447 continue;
448 err = verify_eraseblock_in_one_go(i);
449 if (err)
450 goto out;
451 if (i % 256 == 0)
452 pr_info("verified up to eraseblock %u\n", i);
453
454 err = mtdtest_relax();
455 if (err)
456 goto out;
457 }
458 pr_info("verified %u eraseblocks\n", i);
459
460 /*
461 * Third test: write OOB at varying offsets and lengths, read it back
462 * and verify.
463 */
464 pr_info("test 3 of 5\n");
465
466 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
467 if (err)
468 goto out;
469
470 /* Write all eraseblocks */
471 use_offset = 0;
472 use_len = mtd->oobavail;
473 use_len_max = mtd->oobavail;
474 vary_offset = 1;
475 prandom_seed_state(&rnd_state, 5);
476
477 err = write_whole_device();
478 if (err)
479 goto out;
480
481 /* Check all eraseblocks */
482 use_offset = 0;
483 use_len = mtd->oobavail;
484 use_len_max = mtd->oobavail;
485 vary_offset = 1;
486 prandom_seed_state(&rnd_state, 5);
487 err = verify_all_eraseblocks();
488 if (err)
489 goto out;
490
491 use_offset = 0;
492 use_len = mtd->oobavail;
493 use_len_max = mtd->oobavail;
494 vary_offset = 0;
495
496 /* Fourth test: try to write off end of device */
497 pr_info("test 4 of 5\n");
498
499 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
500 if (err)
501 goto out;
502
503 addr0 = 0;
504 for (i = 0; i < ebcnt && bbt[i]; ++i)
505 addr0 += mtd->erasesize;
506
507 /* Attempt to write off end of OOB */
508 ops.mode = MTD_OPS_AUTO_OOB;
509 ops.len = 0;
510 ops.retlen = 0;
511 ops.ooblen = 1;
512 ops.oobretlen = 0;
513 ops.ooboffs = mtd->oobavail;
514 ops.datbuf = NULL;
515 ops.oobbuf = writebuf;
516 pr_info("attempting to start write past end of OOB\n");
517 pr_info("an error is expected...\n");
518 err = mtd_write_oob(mtd, addr0, &ops);
519 if (err) {
520 pr_info("error occurred as expected\n");
521 err = 0;
522 } else {
523 pr_err("error: can write past end of OOB\n");
524 errcnt += 1;
525 }
526
527 /* Attempt to read off end of OOB */
528 ops.mode = MTD_OPS_AUTO_OOB;
529 ops.len = 0;
530 ops.retlen = 0;
531 ops.ooblen = 1;
532 ops.oobretlen = 0;
533 ops.ooboffs = mtd->oobavail;
534 ops.datbuf = NULL;
535 ops.oobbuf = readbuf;
536 pr_info("attempting to start read past end of OOB\n");
537 pr_info("an error is expected...\n");
538 err = mtd_read_oob(mtd, addr0, &ops);
539 if (mtd_is_bitflip(err))
540 err = 0;
541
542 if (err) {
543 pr_info("error occurred as expected\n");
544 err = 0;
545 } else {
546 pr_err("error: can read past end of OOB\n");
547 errcnt += 1;
548 }
549
550 if (bbt[ebcnt - 1])
551 pr_info("skipping end of device tests because last "
552 "block is bad\n");
553 else {
554 /* Attempt to write off end of device */
555 ops.mode = MTD_OPS_AUTO_OOB;
556 ops.len = 0;
557 ops.retlen = 0;
558 ops.ooblen = mtd->oobavail + 1;
559 ops.oobretlen = 0;
560 ops.ooboffs = 0;
561 ops.datbuf = NULL;
562 ops.oobbuf = writebuf;
563 pr_info("attempting to write past end of device\n");
564 pr_info("an error is expected...\n");
565 err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops);
566 if (err) {
567 pr_info("error occurred as expected\n");
568 err = 0;
569 } else {
570 pr_err("error: wrote past end of device\n");
571 errcnt += 1;
572 }
573
574 /* Attempt to read off end of device */
575 ops.mode = MTD_OPS_AUTO_OOB;
576 ops.len = 0;
577 ops.retlen = 0;
578 ops.ooblen = mtd->oobavail + 1;
579 ops.oobretlen = 0;
580 ops.ooboffs = 0;
581 ops.datbuf = NULL;
582 ops.oobbuf = readbuf;
583 pr_info("attempting to read past end of device\n");
584 pr_info("an error is expected...\n");
585 err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
586 if (mtd_is_bitflip(err))
587 err = 0;
588
589 if (err) {
590 pr_info("error occurred as expected\n");
591 err = 0;
592 } else {
593 pr_err("error: read past end of device\n");
594 errcnt += 1;
595 }
596
597 err = mtdtest_erase_eraseblock(mtd, ebcnt - 1);
598 if (err)
599 goto out;
600
601 /* Attempt to write off end of device */
602 ops.mode = MTD_OPS_AUTO_OOB;
603 ops.len = 0;
604 ops.retlen = 0;
605 ops.ooblen = mtd->oobavail;
606 ops.oobretlen = 0;
607 ops.ooboffs = 1;
608 ops.datbuf = NULL;
609 ops.oobbuf = writebuf;
610 pr_info("attempting to write past end of device\n");
611 pr_info("an error is expected...\n");
612 err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops);
613 if (err) {
614 pr_info("error occurred as expected\n");
615 err = 0;
616 } else {
617 pr_err("error: wrote past end of device\n");
618 errcnt += 1;
619 }
620
621 /* Attempt to read off end of device */
622 ops.mode = MTD_OPS_AUTO_OOB;
623 ops.len = 0;
624 ops.retlen = 0;
625 ops.ooblen = mtd->oobavail;
626 ops.oobretlen = 0;
627 ops.ooboffs = 1;
628 ops.datbuf = NULL;
629 ops.oobbuf = readbuf;
630 pr_info("attempting to read past end of device\n");
631 pr_info("an error is expected...\n");
632 err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
633 if (mtd_is_bitflip(err))
634 err = 0;
635
636 if (err) {
637 pr_info("error occurred as expected\n");
638 err = 0;
639 } else {
640 pr_err("error: read past end of device\n");
641 errcnt += 1;
642 }
643 }
644
645 /* Fifth test: write / read across block boundaries */
646 pr_info("test 5 of 5\n");
647
648 /* Erase all eraseblocks */
649 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt);
650 if (err)
651 goto out;
652
653 /* Write all eraseblocks */
654 prandom_seed_state(&rnd_state, 11);
655 pr_info("writing OOBs of whole device\n");
656 for (i = 0; i < ebcnt - 1; ++i) {
657 int cnt = 2;
658 int pg;
659 size_t sz = mtd->oobavail;
660 if (bbt[i] || bbt[i + 1])
661 continue;
662 addr = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize;
663 prandom_bytes_state(&rnd_state, writebuf, sz * cnt);
664 for (pg = 0; pg < cnt; ++pg) {
665 ops.mode = MTD_OPS_AUTO_OOB;
666 ops.len = 0;
667 ops.retlen = 0;
668 ops.ooblen = sz;
669 ops.oobretlen = 0;
670 ops.ooboffs = 0;
671 ops.datbuf = NULL;
672 ops.oobbuf = writebuf + pg * sz;
673 err = mtd_write_oob(mtd, addr, &ops);
674 if (err)
675 goto out;
676 if (i % 256 == 0)
677 pr_info("written up to eraseblock %u\n", i);
678
679 err = mtdtest_relax();
680 if (err)
681 goto out;
682
683 addr += mtd->writesize;
684 }
685 }
686 pr_info("written %u eraseblocks\n", i);
687
688 /* Check all eraseblocks */
689 prandom_seed_state(&rnd_state, 11);
690 pr_info("verifying all eraseblocks\n");
691 for (i = 0; i < ebcnt - 1; ++i) {
692 if (bbt[i] || bbt[i + 1])
693 continue;
694 prandom_bytes_state(&rnd_state, writebuf, mtd->oobavail * 2);
695 addr = (loff_t)(i + 1) * mtd->erasesize - mtd->writesize;
696 ops.mode = MTD_OPS_AUTO_OOB;
697 ops.len = 0;
698 ops.retlen = 0;
699 ops.ooblen = mtd->oobavail * 2;
700 ops.oobretlen = 0;
701 ops.ooboffs = 0;
702 ops.datbuf = NULL;
703 ops.oobbuf = readbuf;
704 err = mtd_read_oob(mtd, addr, &ops);
705 if (mtd_is_bitflip(err))
706 err = 0;
707
708 if (err)
709 goto out;
710 if (memcmpshow(addr, readbuf, writebuf,
711 mtd->oobavail * 2)) {
712 pr_err("error: verify failed at %#llx\n",
713 (long long)addr);
714 errcnt += 1;
715 if (errcnt > 1000) {
716 pr_err("error: too many errors\n");
717 goto out;
718 }
719 }
720 if (i % 256 == 0)
721 pr_info("verified up to eraseblock %u\n", i);
722
723 err = mtdtest_relax();
724 if (err)
725 goto out;
726 }
727 pr_info("verified %u eraseblocks\n", i);
728
729 pr_info("finished with %d errors\n", errcnt);
730 out:
731 kfree(bbt);
732 kfree(writebuf);
733 kfree(readbuf);
734 put_mtd_device(mtd);
735 if (err)
736 pr_info("error %d occurred\n", err);
737 printk(KERN_INFO "=================================================\n");
738 return err;
739 }
740 module_init(mtd_oobtest_init);
741
742 static void __exit mtd_oobtest_exit(void)
743 {
744 return;
745 }
746 module_exit(mtd_oobtest_exit);
747
748 MODULE_DESCRIPTION("Out-of-band test module");
749 MODULE_AUTHOR("Adrian Hunter");
750 MODULE_LICENSE("GPL");
Linux with added FPC-III support