tree: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master head: 2f313e029020f1fa5f58f38f48ff6988d67fc3c1 commit: 9534d67195118c39edf2ec0bb74e59993c4c0677 [49/61] drbd: Use shash and ahash config: s390-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 9534d67195118c39edf2ec0bb74e59993c4c0677 # save the attached .config to linux build tree make.cross ARCH=s390
All warnings (new ones prefixed by >>):
drivers/block/drbd/drbd_worker.c: In function 'drbd_csum_ee':
>> drivers/block/drbd/drbd_worker.c:304:1: warning: 'drbd_csum_ee' uses dynamic
>> stack allocation
}
^
drivers/block/drbd/drbd_worker.c: In function 'drbd_csum_bio':
>> drivers/block/drbd/drbd_worker.c:327:1: warning: 'drbd_csum_bio' uses
>> dynamic stack allocation
}
^
--
drivers/block/drbd/drbd_receiver.c: In function 'drbd_do_auth':
>> drivers/block/drbd/drbd_receiver.c:5092:1: warning: 'drbd_do_auth' uses
>> dynamic stack allocation
}
^
vim +/drbd_csum_ee +304 drivers/block/drbd/drbd_worker.c
45bb912b Lars Ellenberg 2010-05-14 298 /* and now the last, possibly
only partially used page */
db830c46 Andreas Gruenbacher 2011-02-04 299 len = peer_req->i.size &
(PAGE_SIZE - 1);
45bb912b Lars Ellenberg 2010-05-14 300 sg_set_page(&sg, page, len ?:
PAGE_SIZE, 0);
9534d671 Herbert Xu 2016-01-24 301 ahash_request_set_crypt(req,
&sg, digest, sg.length);
9534d671 Herbert Xu 2016-01-24 302 crypto_ahash_finup(req);
9534d671 Herbert Xu 2016-01-24 303 ahash_request_zero(req);
45bb912b Lars Ellenberg 2010-05-14 @304 }
45bb912b Lars Ellenberg 2010-05-14 305
9534d671 Herbert Xu 2016-01-24 306 void drbd_csum_bio(struct
crypto_ahash *tfm, struct bio *bio, void *digest)
b411b363 Philipp Reisner 2009-09-25 307 {
9534d671 Herbert Xu 2016-01-24 308 AHASH_REQUEST_ON_STACK(req,
tfm);
b411b363 Philipp Reisner 2009-09-25 309 struct scatterlist sg;
7988613b Kent Overstreet 2013-11-23 310 struct bio_vec bvec;
7988613b Kent Overstreet 2013-11-23 311 struct bvec_iter iter;
b411b363 Philipp Reisner 2009-09-25 312
9534d671 Herbert Xu 2016-01-24 313 ahash_request_set_tfm(req, tfm);
9534d671 Herbert Xu 2016-01-24 314 ahash_request_set_callback(req,
0, NULL, NULL);
b411b363 Philipp Reisner 2009-09-25 315
b411b363 Philipp Reisner 2009-09-25 316 sg_init_table(&sg, 1);
9534d671 Herbert Xu 2016-01-24 317 crypto_ahash_init(req);
b411b363 Philipp Reisner 2009-09-25 318
7988613b Kent Overstreet 2013-11-23 319 bio_for_each_segment(bvec, bio,
iter) {
7988613b Kent Overstreet 2013-11-23 320 sg_set_page(&sg,
bvec.bv_page, bvec.bv_len, bvec.bv_offset);
9534d671 Herbert Xu 2016-01-24 321
ahash_request_set_crypt(req, &sg, NULL, sg.length);
9534d671 Herbert Xu 2016-01-24 322
crypto_ahash_update(req);
b411b363 Philipp Reisner 2009-09-25 323 }
9534d671 Herbert Xu 2016-01-24 324 ahash_request_set_crypt(req,
NULL, digest, 0);
9534d671 Herbert Xu 2016-01-24 325 crypto_ahash_final(req);
9534d671 Herbert Xu 2016-01-24 326 ahash_request_zero(req);
b411b363 Philipp Reisner 2009-09-25 @327 }
b411b363 Philipp Reisner 2009-09-25 328
9676c760 Lars Ellenberg 2011-02-22 329 /* MAYBE merge common code with
w_e_end_ov_req */
99920dc5 Andreas Gruenbacher 2011-03-16 330 static int w_e_send_csum(struct
drbd_work *w, int cancel)
:::::: The code at line 304 was first introduced by commit
:::::: 45bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5 drbd: Allow drbd_epoch_entries
to use multiple bios. This should allow for better performance if the lower
level IO stack of the peers differs in limits exposed either via the queue, or
via some merge_bvec_fn.
:::::: TO: Lars Ellenberg <lars.ellenb...@linbit.com>
:::::: CC: Philipp Reisner <philipp.reis...@linbit.com>
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