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diff --git a/arch/x86/Kconfig.assembler b/arch/x86/Kconfig.assembler
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+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+
+config AS_WRUSS
+ def_bool $(as-instr64,wrussq %rax$(comma)(%rbx))
+ help
+ Supported by binutils >= 2.31 and LLVM integrated assembler