1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0129-wireguard-do-not-use-O3.patch b/target/linux/generic/backport-5.4/080-wireguard-0129-wireguard-do-not-use-O3.patch
new file mode 100644
index 0000000000..a7890a7384
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0129-wireguard-do-not-use-O3.patch
@@ -0,0 +1,33 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: "Jason A. Donenfeld" <Jason@zx2c4.com>
+Date: Fri, 4 Jun 2021 17:17:32 +0200
+Subject: [PATCH] wireguard: do not use -O3
+
+commit cc5060ca0285efe2728bced399a1955a7ce808b2 upstream.
+
+Apparently, various versions of gcc have O3-related miscompiles. Looking
+at the difference between -O2 and -O3 for gcc 11 doesn't indicate
+miscompiles, but the difference also doesn't seem so significant for
+performance that it's worth risking.
+
+Link: https://lore.kernel.org/lkml/CAHk-=wjuoGyxDhAF8SsrTkN0-YfCx7E6jUN3ikC_tn2AKWTTsA@mail.gmail.com/
+Link: https://lore.kernel.org/lkml/CAHmME9otB5Wwxp7H8bR_i2uH2esEMvoBMC8uEXBMH9p0q1s6Bw@mail.gmail.com/
+Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
+Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
+Cc: stable@vger.kernel.org
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+---
+ drivers/net/wireguard/Makefile | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+--- a/drivers/net/wireguard/Makefile
++++ b/drivers/net/wireguard/Makefile
+@@ -1,5 +1,4 @@
+-ccflags-y := -O3
+-ccflags-y += -D'pr_fmt(fmt)=KBUILD_MODNAME ": " fmt'
++ccflags-y := -D'pr_fmt(fmt)=KBUILD_MODNAME ": " fmt'
+ ccflags-$(CONFIG_WIREGUARD_DEBUG) += -DDEBUG
+ wireguard-y := main.o
+ wireguard-y += noise.o