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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 <cpw@sgi.com>
Cc: <stable@kernel.org>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Link: http://lkml.kernel.org/r/E1RnXd1-0003wU-PM@eag09.americas.sgi.com
[ Added the uv_irq_lock initialization fix by Dimitri Sivanich ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Cliff Wickman 2012-01-18 09:40:47 -06:00 committed by Ingo Molnar
parent 5a51467b14
commit d2ebc71d47
2 changed files with 3 additions and 1 deletions
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2
arch/x86/platform/uv/tlb_uv.c
View File

@ -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);
}
}

2
arch/x86/platform/uv/uv_irq.c
View File

@ -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);