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-rw-r--r--src/crypto/sha512/sha512block_arm64.s2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/crypto/sha512/sha512block_arm64.s b/src/crypto/sha512/sha512block_arm64.s
index dfc35d69c3..25f3dbfe43 100644
--- a/src/crypto/sha512/sha512block_arm64.s
+++ b/src/crypto/sha512/sha512block_arm64.s
@@ -2,6 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
+//go:build !purego
+
// Based on the Linux Kernel with the following comment:
// Algorithm based on https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb87127bcefc17efab757606e1b1e333fd614dd0
// Originally written by Ard Biesheuvel <ard.biesheuvel@linaro.org>