This patch set fix various problems spotted during T10/DIF integrity machinery testing. TOC: ## Fix various bugs in T10/DIF/DIX infrastructure 0001-bio-integrity-Do-not-allocate-integrity-context-for-fsync 0002-bio-integrity-save-original-iterator-for-verify-stage 0003-bio-integrity-bio_trim-should-truncate-integrity-vec 0004-bio-integrity-fix-interface-for-bio_integrity_trim ## Cleanup T10/DIF/DIX infrastructure 0005-bio-integrity-add-bio_integrity_setup-helper 0006-T10-Move-opencoded-contants-to-common-header ## General bulletproof protection for block layer 0007-Guard-bvec-iteration-logic-v2 Changes since V1 - fix issues potted by kbuild bot - Replace BUG_ON with error logic for 7'th patch Testcase: xfstest blockdev/003 https://github.com/dmonakhov/xfstests/commit/3c6509eaa83b9c17cd0bc95d73fcdd76e1c54a85
