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[2003:d8:2f26:ba00:803:6ec5:9918:6fd]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-3c074d43b9asm12707153f8f.24.2025.08.21.13.08.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 Aug 2025 13:08:34 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: David Hildenbrand , Herbert Xu , "David S. Miller" , 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 31/35] crypto: remove nth_page() usage within SG entry Date: Thu, 21 Aug 2025 22:06:57 +0200 Message-ID: <20250821200701.1329277-32-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> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit It's no longer required to use nth_page() when iterating pages within a single SG entry, so let's drop the nth_page() usage. Cc: Herbert Xu Cc: "David S. Miller" Signed-off-by: David Hildenbrand --- crypto/ahash.c | 4 ++-- crypto/scompress.c | 8 ++++---- include/crypto/scatterwalk.h | 4 ++-- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/crypto/ahash.c b/crypto/ahash.c index a227793d2c5b5..a9f757224a223 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -88,7 +88,7 @@ static int hash_walk_new_entry(struct crypto_hash_walk *walk) sg = walk->sg; walk->offset = sg->offset; - walk->pg = nth_page(sg_page(walk->sg), (walk->offset >> PAGE_SHIFT)); + walk->pg = sg_page(walk->sg) + walk->offset / PAGE_SIZE; walk->offset = offset_in_page(walk->offset); walk->entrylen = sg->length; @@ -226,7 +226,7 @@ int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc) if (!IS_ENABLED(CONFIG_HIGHMEM)) return crypto_shash_digest(desc, data, nbytes, req->result); - page = nth_page(page, offset >> PAGE_SHIFT); + page += offset / PAGE_SIZE; offset = offset_in_page(offset); if (nbytes > (unsigned int)PAGE_SIZE - offset) diff --git a/crypto/scompress.c b/crypto/scompress.c index c651e7f2197a9..1a7ed8ae65b07 100644 --- a/crypto/scompress.c +++ b/crypto/scompress.c @@ -198,7 +198,7 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir) } else return -ENOSYS; - dpage = nth_page(dpage, doff / PAGE_SIZE); + dpage += doff / PAGE_SIZE; doff = offset_in_page(doff); n = (dlen - 1) / PAGE_SIZE; @@ -220,12 +220,12 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir) } else break; - spage = nth_page(spage, soff / PAGE_SIZE); + spage = spage + soff / PAGE_SIZE; soff = offset_in_page(soff); n = (slen - 1) / PAGE_SIZE; n += (offset_in_page(slen - 1) + soff) / PAGE_SIZE; - if (PageHighMem(nth_page(spage, n)) && + if (PageHighMem(spage + n) && size_add(soff, slen) > PAGE_SIZE) break; src = kmap_local_page(spage) + soff; @@ -270,7 +270,7 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir) if (dlen <= PAGE_SIZE) break; dlen -= PAGE_SIZE; - dpage = nth_page(dpage, 1); + dpage++; } } diff --git a/include/crypto/scatterwalk.h b/include/crypto/scatterwalk.h index 15ab743f68c8f..cdf8497d19d27 100644 --- a/include/crypto/scatterwalk.h +++ b/include/crypto/scatterwalk.h @@ -159,7 +159,7 @@ static inline void scatterwalk_map(struct scatter_walk *walk) if (IS_ENABLED(CONFIG_HIGHMEM)) { struct page *page; - page = nth_page(base_page, offset >> PAGE_SHIFT); + page = base_page + offset / PAGE_SIZE; offset = offset_in_page(offset); addr = kmap_local_page(page) + offset; } else { @@ -259,7 +259,7 @@ static inline void scatterwalk_done_dst(struct scatter_walk *walk, end += (offset_in_page(offset) + offset_in_page(nbytes) + PAGE_SIZE - 1) >> PAGE_SHIFT; for (i = start; i < end; i++) - flush_dcache_page(nth_page(base_page, i)); + flush_dcache_page(base_page + i); } scatterwalk_advance(walk, nbytes); } -- 2.50.1