crypto/arm64: aes-ce-ccm - Avoid pointless yield of the NEON unit

Kernel mode NEON sections are now preemptible on arm64, and so there is
no need to yield it explicitly in order to prevent scheduling latency
spikes.

Reviewed-by: Eric Biggers <ebiggers@kernel.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c b/arch/arm64/crypto/aes-ce-ccm-glue.c
index 2d791d51891b4699459af725d8bdd023035cd7e9..2eb4e76cabc3a171ae16e06ec783495dd66c627b 100644 (file)
--- a/arch/arm64/crypto/aes-ce-ccm-glue.c
+++ b/arch/arm64/crypto/aes-ce-ccm-glue.c
@@ -114,11 +114,8 @@ static u32 ce_aes_ccm_auth_data(u8 mac[], u8 const in[], u32 abytes,
                        in += adv;
                        abytes -= adv;
 
-                       if (unlikely(rem)) {
-                               kernel_neon_end();
-                               kernel_neon_begin();
+                       if (unlikely(rem))
                                macp = 0;
-                       }
                } else {
                        u32 l = min(AES_BLOCK_SIZE - macp, abytes);