Hi Ross, [auto build test WARNING on linux-nvdimm/libnvdimm-for-next] [also build test WARNING on v4.13-rc3] [cannot apply to next-20170803] [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/Ross-Zwisler/btt-remove-btt_rw_page/20170729-165642 base: https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-for-next config: i386-randconfig-h0-08032208 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): In file included from drivers/nvdimm/btt.c:27:0: drivers/nvdimm/btt.c: In function 'btt_make_request': >> drivers/nvdimm/nd.h:407:2: warning: 'start' may be used uninitialized in >> this function [-Wmaybe-uninitialized] generic_end_io_acct(bio_data_dir(bio), &disk->part0, start); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/nvdimm/btt.c:1202:16: note: 'start' was declared here unsigned long start; ^~~~~ vim +/start +407 drivers/nvdimm/nd.h cd03412a5 Dan Williams 2016-03-11 340 3d88002e4 Dan Williams 2015-05-31 341 struct nd_region *to_nd_region(struct device *dev); 3d88002e4 Dan Williams 2015-05-31 342 int nd_region_to_nstype(struct nd_region *nd_region); 3d88002e4 Dan Williams 2015-05-31 343 int nd_region_register_namespaces(struct nd_region *nd_region, int *err); c12c48ce8 Dan Williams 2017-06-04 344 u64 nd_region_interleave_set_cookie(struct nd_region *nd_region, c12c48ce8 Dan Williams 2017-06-04 345 struct nd_namespace_index *nsindex); 86ef58a4e Dan Williams 2017-02-28 346 u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region); 3d88002e4 Dan Williams 2015-05-31 347 void nvdimm_bus_lock(struct device *dev); 3d88002e4 Dan Williams 2015-05-31 348 void nvdimm_bus_unlock(struct device *dev); 3d88002e4 Dan Williams 2015-05-31 349 bool is_nvdimm_bus_locked(struct device *dev); 581388209 Dan Williams 2015-06-23 350 int nvdimm_revalidate_disk(struct gendisk *disk); bf9bccc14 Dan Williams 2015-06-17 351 void nvdimm_drvdata_release(struct kref *kref); bf9bccc14 Dan Williams 2015-06-17 352 void put_ndd(struct nvdimm_drvdata *ndd); 4a826c83d Dan Williams 2015-06-09 353 int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd); 4a826c83d Dan Williams 2015-06-09 354 void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res); 4a826c83d Dan Williams 2015-06-09 355 struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd, 4a826c83d Dan Williams 2015-06-09 356 struct nd_label_id *label_id, resource_size_t start, 4a826c83d Dan Williams 2015-06-09 357 resource_size_t n); 8c2f7e865 Dan Williams 2015-06-25 358 resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns); 8c2f7e865 Dan Williams 2015-06-25 359 struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev); 5212e11fd Vishal Verma 2015-06-25 360 int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns); 298f2bc5d Dan Williams 2016-03-15 361 int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt); 5212e11fd Vishal Verma 2015-06-25 362 const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, 5212e11fd Vishal Verma 2015-06-25 363 char *name); f979b13c3 Dan Williams 2017-06-04 364 unsigned int pmem_sector_size(struct nd_namespace_common *ndns); a39018029 Dan Williams 2016-04-07 365 void nvdimm_badblocks_populate(struct nd_region *nd_region, a39018029 Dan Williams 2016-04-07 366 struct badblocks *bb, const struct resource *res); 200c79da8 Dan Williams 2016-03-22 367 #if IS_ENABLED(CONFIG_ND_CLAIM) ac515c084 Dan Williams 2016-03-22 368 struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn, ac515c084 Dan Williams 2016-03-22 369 struct resource *res, struct vmem_altmap *altmap); 200c79da8 Dan Williams 2016-03-22 370 int devm_nsio_enable(struct device *dev, struct nd_namespace_io *nsio); 200c79da8 Dan Williams 2016-03-22 371 void devm_nsio_disable(struct device *dev, struct nd_namespace_io *nsio); 200c79da8 Dan Williams 2016-03-22 372 #else ac515c084 Dan Williams 2016-03-22 373 static inline struct vmem_altmap *nvdimm_setup_pfn(struct nd_pfn *nd_pfn, ac515c084 Dan Williams 2016-03-22 374 struct resource *res, struct vmem_altmap *altmap) ac515c084 Dan Williams 2016-03-22 375 { ac515c084 Dan Williams 2016-03-22 376 return ERR_PTR(-ENXIO); ac515c084 Dan Williams 2016-03-22 377 } 200c79da8 Dan Williams 2016-03-22 378 static inline int devm_nsio_enable(struct device *dev, 200c79da8 Dan Williams 2016-03-22 379 struct nd_namespace_io *nsio) 200c79da8 Dan Williams 2016-03-22 380 { 200c79da8 Dan Williams 2016-03-22 381 return -ENXIO; 200c79da8 Dan Williams 2016-03-22 382 } 200c79da8 Dan Williams 2016-03-22 383 static inline void devm_nsio_disable(struct device *dev, 200c79da8 Dan Williams 2016-03-22 384 struct nd_namespace_io *nsio) 200c79da8 Dan Williams 2016-03-22 385 { 200c79da8 Dan Williams 2016-03-22 386 } 200c79da8 Dan Williams 2016-03-22 387 #endif 047fc8a1f Ross Zwisler 2015-06-25 388 int nd_blk_region_init(struct nd_region *nd_region); e5ae3b252 Dan Williams 2016-06-07 389 int nd_region_activate(struct nd_region *nd_region); f0dc089ce Dan Williams 2015-05-16 390 void __nd_iostat_start(struct bio *bio, unsigned long *start); f0dc089ce Dan Williams 2015-05-16 391 static inline bool nd_iostat_start(struct bio *bio, unsigned long *start) f0dc089ce Dan Williams 2015-05-16 392 { f0dc089ce Dan Williams 2015-05-16 393 struct gendisk *disk = bio->bi_bdev->bd_disk; f0dc089ce Dan Williams 2015-05-16 394 f0dc089ce Dan Williams 2015-05-16 395 if (!blk_queue_io_stat(disk->queue)) f0dc089ce Dan Williams 2015-05-16 396 return false; f0dc089ce Dan Williams 2015-05-16 397 8d7c22ac0 Toshi Kani 2016-10-19 398 *start = jiffies; 8d7c22ac0 Toshi Kani 2016-10-19 399 generic_start_io_acct(bio_data_dir(bio), 8d7c22ac0 Toshi Kani 2016-10-19 400 bio_sectors(bio), &disk->part0); f0dc089ce Dan Williams 2015-05-16 401 return true; f0dc089ce Dan Williams 2015-05-16 402 } 8d7c22ac0 Toshi Kani 2016-10-19 403 static inline void nd_iostat_end(struct bio *bio, unsigned long start) 8d7c22ac0 Toshi Kani 2016-10-19 404 { 8d7c22ac0 Toshi Kani 2016-10-19 405 struct gendisk *disk = bio->bi_bdev->bd_disk; 8d7c22ac0 Toshi Kani 2016-10-19 406 8d7c22ac0 Toshi Kani 2016-10-19 @407 generic_end_io_acct(bio_data_dir(bio), &disk->part0, start); :::::: The code at line 407 was first introduced by commit :::::: 8d7c22ac0c036978a072b7e13c607b5402c474e0 libnvdimm: use generic iostat interfaces :::::: TO: Toshi Kani <toshi.k...@hpe.com> :::::: CC: Dan Williams <dan.j.willi...@intel.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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