0006-arm64-spinlock-fix-a-Wunused-function-warning.patch

From fff4e1cf99d87b3f4ce28cd645e0689150c89b4e Mon Sep 17 00:00:00 2001
From: AltArch Kernel <noreply@centos.org>
Date: Tue, 15 Sep 2020 14:41:02 +0800
Subject: [PATCH 06/25] arm64/spinlock: fix a -Wunused-function warning

mainline inclusion
from mainline-v5.8-rc5
commit 345d52c184dc7de98cff63f1bfa6f90e9db19809
category: bugfix
bugzilla: NA
DTS: #231
CVE: NA

--------------------------------

The commit f5bfdc8e3947 ("locking/osq: Use optimized spinning loop for
arm64") introduced a warning from Clang because vcpu_is_preempted() is
compiled away,

kernel/locking/osq_lock.c:25:19: warning: unused function 'node_cpu'
[-Wunused-function]
static inline int node_cpu(struct optimistic_spin_node *node)
                  ^
1 warning generated.

Fix it by converting vcpu_is_preempted() to a static inline function.

Fixes: f5bfdc8e3947 ("locking/osq: Use optimized spinning loop for arm64")
---
 arch/arm64/include/asm/spinlock.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/spinlock.h b/arch/arm64/include/asm/spinlock.h
index aa08c06..4d32a43 100644
--- a/arch/arm64/include/asm/spinlock.h
+++ b/arch/arm64/include/asm/spinlock.h
@@ -36,6 +36,10 @@
  * See:
  * https://lore.kernel.org/lkml/20200110100612.GC2827@hirez.programming.kicks-ass.net
  */
-#define vcpu_is_preempted(cpu)	false
+#define vcpu_is_preempted vcpu_is_preempted
+static inline bool vcpu_is_preempted(int cpu)
+{
+	return false;
+}
 
 #endif /* __ASM_SPINLOCK_H */
-- 
1.8.3.1