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crypto: remove nth_page() usage within SG entry

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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.

Link: https://lkml.kernel.org/r/20250901150359.867252-34-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
David Hildenbrand
2025-09-01 17:03:54 +02:00
committed by Andrew Morton
parent fae6406bca
commit ce00897b94
3 changed files with 8 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
crypto/ahash.c
View File

@@ -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_SHIFT);
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_SHIFT;
offset = offset_in_page(offset);
if (nbytes > (unsigned int)PAGE_SIZE - offset)

8
crypto/scompress.c
View File

@@ -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++;
}
}

4
include/crypto/scatterwalk.h
View File

@@ -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_SHIFT);
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);
}