From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio

---
 kernel/arch/ia64/include/asm/spinlock.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/arch/ia64/include/asm/spinlock.h b/kernel/arch/ia64/include/asm/spinlock.h
index afd0b31..5f620e6 100644
--- a/kernel/arch/ia64/include/asm/spinlock.h
+++ b/kernel/arch/ia64/include/asm/spinlock.h
@@ -73,6 +73,8 @@
 {
 	unsigned short	*p = (unsigned short *)&lock->lock + 1, tmp;
 
+	/* This could be optimised with ARCH_HAS_MMIOWB */
+	mmiowb();
 	asm volatile ("ld2.bias %0=[%1]" : "=r"(tmp) : "r"(p));
 	WRITE_ONCE(*p, (tmp + 2) & ~1);
 }

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