[v3 PATCH 03/13] crypto: arm64/sha256 - remove obsolete chunking logic
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2025-04-28 05:17:14
Also in:
linux-arch, linux-arm-kernel, linux-crypto, linux-mips, linux-riscv, linux-s390, lkml, sparclinux
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
From: Eric Biggers <redacted> Since kernel-mode NEON sections are now preemptible on arm64, there is no longer any need to limit the length of them. Signed-off-by: Eric Biggers <redacted> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> --- arch/arm64/crypto/sha256-glue.c | 19 ++----------------- 1 file changed, 2 insertions(+), 17 deletions(-)
diff --git a/arch/arm64/crypto/sha256-glue.c b/arch/arm64/crypto/sha256-glue.c
index 26f9fdfae87b..d63ea82e1374 100644
--- 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,
--
2.39.5