[PATCH] ARM: Fix spinlock bad magic on disabling nonboot cpu
From: Colin Cross
Date: Fri Nov 19 2010 - 21:17:31 EST
The init_mm.context.id_lock spinlock is not initialized, which
causes a spinlock bad magic warning when nonboot cpus are disabled,
either through hotplug or during suspend.
Signed-off-by: Colin Cross <ccross@xxxxxxxxxxx>
---
arch/arm/include/asm/mmu.h | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/arm/include/asm/mmu.h b/arch/arm/include/asm/mmu.h
index 68870c7..1556f6a 100644
--- a/arch/arm/include/asm/mmu.h
+++ b/arch/arm/include/asm/mmu.h
@@ -13,6 +13,8 @@ typedef struct {
#ifdef CONFIG_CPU_HAS_ASID
#define ASID(mm) ((mm)->context.id & 255)
+#define INIT_MM_CONTEXT(name) \
+ .context.id_lock = __SPIN_LOCK_UNLOCKED(name.context.id_lock),
#else
#define ASID(mm) (0)
#endif
--
1.7.3.1
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