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SubjectRe: [PATCH v3 46/49] fs/btrfs: convert to bio_for_each_segment_all_sp()
Hi Ming,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.13-rc4 next-20170810]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Ming-Lei/block-support-multipage-bvec/20170810-110521
config: x86_64-randconfig-b0-08112217 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All warnings (new ones prefixed by >>):

fs/btrfs/raid56.c: In function 'find_logical_bio_stripe':
>> fs/btrfs/raid56.c:1368: warning: unused variable 'bia'

vim +/bia +1368 fs/btrfs/raid56.c

1356
1357 /*
1358 * helper to find the stripe number for a given
1359 * bio (before mapping). Used to figure out which stripe has
1360 * failed. This looks up based on logical block numbers.
1361 */
1362 static int find_logical_bio_stripe(struct btrfs_raid_bio *rbio,
1363 struct bio *bio)
1364 {
1365 u64 logical = bio->bi_iter.bi_sector;
1366 u64 stripe_start;
1367 int i;
> 1368 struct bvec_iter_all bia;
1369
1370 logical <<= 9;
1371
1372 for (i = 0; i < rbio->nr_data; i++) {
1373 stripe_start = rbio->bbio->raid_map[i];
1374 if (logical >= stripe_start &&
1375 logical < stripe_start + rbio->stripe_len) {
1376 return i;
1377 }
1378 }
1379 return -1;
1380 }
1381

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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