From 4bb689eee12ceb6d669a0c9a519037c049a8af38 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 9 Jul 2008 14:33:33 +0200
Subject: [PATCH] x86: paravirt spinlocks, !CONFIG_SMP build fixes
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/paravirt.c | 4 ++++
include/asm-x86/paravirt.h | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index bba4041bb7ff2..6aa8aed06d544 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -270,11 +270,13 @@ enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
void __init paravirt_use_bytelocks(void)
{
+#ifdef CONFIG_SMP
pv_lock_ops.spin_is_locked = __byte_spin_is_locked;
pv_lock_ops.spin_is_contended = __byte_spin_is_contended;
pv_lock_ops.spin_lock = __byte_spin_lock;
pv_lock_ops.spin_trylock = __byte_spin_trylock;
pv_lock_ops.spin_unlock = __byte_spin_unlock;
+#endif
}
struct pv_info pv_info = {
@@ -461,12 +463,14 @@ struct pv_mmu_ops pv_mmu_ops = {
};
struct pv_lock_ops pv_lock_ops = {
+#ifdef CONFIG_SMP
.spin_is_locked = __ticket_spin_is_locked,
.spin_is_contended = __ticket_spin_is_contended,
.spin_lock = __ticket_spin_lock,
.spin_trylock = __ticket_spin_trylock,
.spin_unlock = __ticket_spin_unlock,
+#endif
};
EXPORT_SYMBOL_GPL(pv_time_ops);
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 65ed02cdbbd79..b2aba8fdaae72 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -1387,6 +1387,8 @@ void _paravirt_nop(void);
void paravirt_use_bytelocks(void);
+#ifdef CONFIG_SMP
+
static inline int __raw_spin_is_locked(struct raw_spinlock *lock)
{
return PVOP_CALL1(int, pv_lock_ops.spin_is_locked, lock);
@@ -1412,6 +1414,8 @@ static __always_inline void __raw_spin_unlock(struct raw_spinlock *lock)
return PVOP_VCALL1(pv_lock_ops.spin_unlock, lock);
}
+#endif
+
/* These all sit in the .parainstructions section to tell us what to patch. */
struct paravirt_patch_site {
u8 *instr; /* original instructions */
--
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