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[2003:d8:2f26:ba00:803:6ec5:9918:6fd]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-45b50e3a587sm10028205e9.18.2025.08.21.13.08.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 Aug 2025 13:08:42 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: David Hildenbrand , Alexander Potapenko , Andrew Morton , Brendan Jackman , Christoph Lameter , Dennis Zhou , Dmitry Vyukov , dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, iommu@lists.linux.dev, io-uring@vger.kernel.org, Jason Gunthorpe , Jens Axboe , Johannes Weiner , John Hubbard , kasan-dev@googlegroups.com, kvm@vger.kernel.org, "Liam R. Howlett" , Linus Torvalds , linux-arm-kernel@axis.com, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ide@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mips@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, Lorenzo Stoakes , Marco Elver , Marek Szyprowski , Michal Hocko , Mike Rapoport , Muchun Song , netdev@vger.kernel.org, Oscar Salvador , Peter Xu , Robin Murphy , Suren Baghdasaryan , Tejun Heo , virtualization@lists.linux.dev, Vlastimil Babka , wireguard@lists.zx2c4.com, x86@kernel.org, Zi Yan Subject: [PATCH RFC 34/35] block: update comment of "struct bio_vec" regarding nth_page() Date: Thu, 21 Aug 2025 22:07:00 +0200 Message-ID: <20250821200701.1329277-35-david@redhat.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250821200701.1329277-1-david@redhat.com> References: <20250821200701.1329277-1-david@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: bufAakMtFosVAquu9QvH63_-uPfeU_m6Ow0cbcr3NXs_1755806923 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-Stat-Signature: 3kxkq76j1unhf7axayy6e3mpi9ae663t X-Rspam-User: X-Rspamd-Queue-Id: 6CCEE1C0003 X-Rspamd-Server: rspam05 X-HE-Tag: 1755806926-698799 X-HE-Meta: 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 x0vMf2ZW 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Ever since commit 858c708d9efb ("block: move the bi_size update out of __bio_try_merge_page"), page_is_mergeable() no longer exists, and the logic in bvec_try_merge_page() is now a simple page pointer comparison. Signed-off-by: David Hildenbrand --- include/linux/bvec.h | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/include/linux/bvec.h b/include/linux/bvec.h index 0a80e1f9aa201..3fc0efa0825b1 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -22,11 +22,8 @@ struct page; * @bv_len: Number of bytes in the address range. * @bv_offset: Start of the address range relative to the start of @bv_page. * - * The following holds for a bvec if n * PAGE_SIZE < bv_offset + bv_len: - * - * nth_page(@bv_page, n) == @bv_page + n - * - * This holds because page_is_mergeable() checks the above property. + * All pages within a bio_vec starting from @bv_page are contiguous and + * can simply be iterated (see bvec_advance()). */ struct bio_vec { struct page *bv_page; -- 2.50.1