Commit 642cfc06 authored by Eric Biggers's avatar Eric Biggers Committed by Herbert Xu
Browse files

crypto: arm64/sha256 - remove obsolete chunking logic 



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

Reviewed-by: default avatarArd Biesheuvel <ardb@kernel.org>
Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent ca4477e4

arch/arm64/crypto/sha256-glue.c

+2 −17
Original line number Diff line number Diff line
@@ -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,

	return sha256_base_do_update_blocks(desc, data, len,

					    sha256_neon_transform);

		data += chunk;

		len -= chunk;

	} while (len >= SHA256_BLOCK_SIZE);

	return len;

}



static int sha256_finup_neon(struct shash_desc *desc, const u8 *data,