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From 81a3970fca5759499effc3131e59c9bd8f446cc9 Mon Sep 17 00:00:00 2001
From: Georgy Yakovlev <gyakovlev@gentoo.org>
Date: Wed, 26 Aug 2020 16:02:48 -0700
Subject: [PATCH] module/zstd: pass -U__BMI__
Closes: https://github.com/openzfs/zfs/issues/10758
Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org>
---
module/zstd/Makefile.in | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/module/zstd/Makefile.in b/module/zstd/Makefile.in
index eea749ea8..bfceca920 100644
--- a/module/zstd/Makefile.in
+++ b/module/zstd/Makefile.in
@@ -20,6 +20,10 @@ ccflags-y += -O3
# Set it for other compilers, too.
$(obj)/lib/zstd.o: c_flags += -fno-tree-vectorize
+# SSE register return with SSE disabled if -march=znverX is passed
+# https://github.com/openzfs/zfs/issues/10758
+$(obj)/lib/zstd.o: c_flags += -U__BMI__
+
# Quiet warnings about frame size due to unused code in unmodified zstd lib
$(obj)/lib/zstd.o: c_flags += -Wframe-larger-than=20480
--
2.28.0
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