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Fri, 28 Nov 2025 00:32:57 -0800 (PST) From: zhangshida X-Google-Original-From: zhangshida To: Johannes.Thumshirn@wdc.com, hch@infradead.org, gruenba@redhat.com, ming.lei@redhat.com, siangkao@linux.alibaba.com Cc: linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, nvdimm@lists.linux.dev, virtualization@lists.linux.dev, linux-nvme@lists.infradead.org, gfs2@lists.linux.dev, ntfs3@lists.linux.dev, linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org, zhangshida@kylinos.cn, starzhangzsd@gmail.com, Andreas Gruenbacher Subject: [PATCH v2 04/12] block: prohibit calls to bio_chain_endio Date: Fri, 28 Nov 2025 16:32:11 +0800 Message-Id: <20251128083219.2332407-5-zhangshida@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20251128083219.2332407-1-zhangshida@kylinos.cn> References: <20251128083219.2332407-1-zhangshida@kylinos.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Shida Zhang Now that all potential callers of bio_chain_endio have been eliminated, completely prohibit any future calls to this function. Suggested-by: Ming Lei Suggested-by: Andreas Gruenbacher Suggested-by: Christoph Hellwig Signed-off-by: Shida Zhang --- block/bio.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/block/bio.c b/block/bio.c index aa43435c15f..2473a2c0d2f 100644 --- a/block/bio.c +++ b/block/bio.c @@ -323,8 +323,13 @@ static struct bio *__bio_chain_endio(struct bio *bio) return parent; } =20 +/** + * This function should only be used as a flag and must never be called. + * If execution reaches here, it indicates a serious programming error. + */ static void bio_chain_endio(struct bio *bio) { + BUG_ON(1); bio_endio(bio); } =20 --=20 2.34.1