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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 v1 14/36] mm/mm/percpu-km: drop nth_page() usage within single allocation Date: Thu, 28 Aug 2025 00:01:18 +0200 Message-ID: <20250827220141.262669-15-david@redhat.com> In-Reply-To: <20250827220141.262669-1-david@redhat.com> References: <20250827220141.262669-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Stat-Signature: akauxyrasxi8wwcp6mdtr8icwwy5hwp7 X-Rspam-User: X-Rspamd-Queue-Id: 989551C0003 X-Rspamd-Server: rspam05 X-HE-Tag: 1756332386-962224 X-HE-Meta: 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 bnSuS0aH 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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: 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(). 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