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crypto: arm64/sha256 - remove obsolete chunking logic

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Since kernel-mode NEON sections are now preemptible on arm64, there is
no longer any need to limit the length of them.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
2025-04-28 10:00:28 -07:00
committed by Herbert Xu
parent ca4477e41c
commit 642cfc0680
1 changed files with 2 additions and 17 deletions
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19
arch/arm64/crypto/sha256-glue.c
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@@ -86,23 +86,8 @@ static struct shash_alg algs[] = { {
static int sha256_update_neon(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
do {
unsigned int chunk = len;
/*
* Don't hog the CPU for the entire time it takes to process all
* input when running on a preemptible kernel, but process the
* data block by block instead.
*/
if (IS_ENABLED(CONFIG_PREEMPTION))
chunk = SHA256_BLOCK_SIZE;
chunk -= sha256_base_do_update_blocks(desc, data, chunk,
sha256_neon_transform);
data += chunk;
len -= chunk;
} while (len >= SHA256_BLOCK_SIZE);
return len;
return sha256_base_do_update_blocks(desc, data, len,
sha256_neon_transform);
}
static int sha256_finup_neon(struct shash_desc *desc, const u8 *data,