commit: d2ebc71d472020bc30e29afe8c4d2a85a5b41f56
From: Cliff Wickman <[email protected]>
Date: Wed, 18 Jan 2012 09:40:47 -0600
Subject: x86/uv: Fix uninitialized spinlocks
Initialize two spinlocks in tlb_uv.c and also properly define/initialize
the uv_irq_lock.
The lack of explicit initialization seems to be functionally
harmless, but it is diagnosed when these are turned on:
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_LOCKDEP=y
Signed-off-by: Cliff Wickman <[email protected]>
Cc: <[email protected]>
Cc: Dimitri Sivanich <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
[ Added the uv_irq_lock initialization fix by Dimitri Sivanich ]
Signed-off-by: Ingo Molnar <[email protected]>
---
arch/x86/platform/uv/tlb_uv.c | 2 ++
arch/x86/platform/uv/uv_irq.c | 2 +-
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index 9be4cff..3ae0e61 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -1851,6 +1851,8 @@ static void __init init_per_cpu_tunables(void)
bcp->cong_reps = congested_reps;
bcp->cong_period = congested_period;
bcp->clocks_per_100_usec = usec_2_cycles(100);
+ spin_lock_init(&bcp->queue_lock);
+ spin_lock_init(&bcp->uvhub_lock);
}
}
diff --git a/arch/x86/platform/uv/uv_irq.c b/arch/x86/platform/uv/uv_irq.c
index 374a05d..f25c276 100644
--- a/arch/x86/platform/uv/uv_irq.c
+++ b/arch/x86/platform/uv/uv_irq.c
@@ -25,7 +25,7 @@ struct uv_irq_2_mmr_pnode{
int irq;
};
-static spinlock_t uv_irq_lock;
+static DEFINE_SPINLOCK(uv_irq_lock);
static struct rb_root uv_irq_root;
static int uv_set_irq_affinity(struct irq_data *, const struct cpumask *,
bool);
--
1.7.3.4
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