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Howlett" , 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, 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, 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 v2 14/37] mm/mm/percpu-km: drop nth_page() usage within single allocation Date: Mon, 1 Sep 2025 17:03:35 +0200 Message-ID: <20250901150359.867252-15-david@redhat.com> In-Reply-To: <20250901150359.867252-1-david@redhat.com> References: <20250901150359.867252-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: A670A1A0002 X-Stat-Signature: bgcn1fregrerb9d4nwyi5hbyf5wfhuro X-HE-Tag: 1756739305-576617 X-HE-Meta: U2FsdGVkX18MolaCy3nKnmE5/WLkZVWP2rXmGjqWa5hKk+sckQf+ySExXW34RQmk5acsTDg9EnSiB8ixvGxXHW48ynlLv62VrSexuED/+ONDW/eWHFqXn6oJrZ4HHiFSuWAYyXQSNxXCAfQpXRAkVWATcZmhlpIyq/lvIGXeLdjctV2+1e6sxydzA4jh2BE0cJ8esZQAbztRBlhS1gJ6E+byJjqvq0QErkG6Uot6Uav8M6NJZGyD3+W1iE2f/cvxf54mcuF8VB/MWWtwv7FKIpIM9VCs3A3MmSenX6fJZFKP2KOYoCixDq4FJY0bKumcwQBKR7I93cZ9c6ra+cRCMdK4XGwxtJkyiVucjhGZLinLZYih+uj6CYcHEudzOD4lqyOwdVacEcdsFiu/9IV5sP3svIeblddTwmgEWM7c8YeZxRmfWZ1h5v8rGQAPgDKmkIzxgvytQsMvGev/+uExa8dJPqJBrUGsfMlbHWXhtKEK+mVYk0t1uqiyGNCoKGhhx0E9lJVYIQAeX4PKxRP6cYohFos8EgasZdXHRiiHFcMxwm3QqNqjr0heZEe3Zj/2tbefiG+bmF1kR0m8ETaBduhZJAgn5cplfUVdbexi44Qtp8D2GAWkz88d2HmuX90adHwE72GSaPEQCk/76XxuiwbP5MLziAjl4a6GnPmPewGB9bKIiODE8QwMwtdzV3XfRfkUHaiewGR+38dYCz3XWdVm1TWRMT5EYFWkse0wNyyJcNz/sfYB5LMwbYhwuS/1e1BapdbtSzdbdvL1JbGKDBZ/HuyXjcfBdab8jyFfZjM4CqC8ddHDPSgzfWLpaSqEoe03l5NZjthCvB/nbwFfoXVWU4PzA3h+xN7Q1sYf/nULz/Jbc0bBOXkwlJ8HEzmbjlL5qVg11p2ivpsClo2hveBViOyaTzCOTvZ9VI3Sji9mP3Z+9zKjw3zYqjpt6N+2qY6bL6soZlrVUqsPuWb ZenPUNYu baMeBOlBmMaxJYmujNLRwWe+H1mgjR6OP+EmTDfq3D66SCbPUbNUxndIuE9uhrB+poITTsulsZEQDxeuglF7dRgXTCmZw+9thdJL6UoEecUoTmTufA13k2UzeoG866OGobw7O/152hAa/z5/SoE6McmgCr4OtS7O9BQmcI+aaOS+xMie46vtoxmdhkKCF7EtLugBuOwRIk39XSbE/nw5OnnBHPwm+IkpXaVUHQB/4MX5zn+mWYj9TvcbzTZabylcauWx0ZktYG/ChdK+tbXwFgUjNrNMuI+nr+jo2hQIm9pyUoavtrz9FpDR/EYSyBXFugfzkvNc7Ak8oF4qYYIZc/QIbt7PNNU0uZZbpxvBIVDRkkIHG0LrBGhaJer63fz+m9QELz1yeOAITCYZRqyfwHcOdBw== 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: We're allocating a higher-order page from the buddy. For these pages (that are guaranteed to not exceed a single memory section) there is no need to use nth_page(). Reviewed-by: Lorenzo Stoakes Acked-by: Liam R. Howlett Signed-off-by: David Hildenbrand --- mm/percpu-km.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/percpu-km.c b/mm/percpu-km.c index fe31aa19db81a..4efa74a495cb6 100644 --- a/mm/percpu-km.c +++ b/mm/percpu-km.c @@ -69,7 +69,7 @@ static struct pcpu_chunk *pcpu_create_chunk(gfp_t gfp) } for (i = 0; i < nr_pages; i++) - pcpu_set_page_chunk(nth_page(pages, i), chunk); + pcpu_set_page_chunk(pages + i, chunk); chunk->data = pages; chunk->base_addr = page_address(pages); -- 2.50.1