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: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/arch/arm64/crypto/sha256-glue.c b/arch/arm64/crypto/sha256-glue.c
index 26f9fdfae87bfd5e56169ab34b74de84093c566d..d63ea82e1374edc84cc91d8f8ab01b494f542e53 100644 (file)
--- a/arch/arm64/crypto/sha256-glue.c
+++ b/arch/arm64/crypto/sha256-glue.c
@@ -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,