diff options
| author |   Ingo Molnar <mingo@elte.hu> | 2008-12-26 19:02:20 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-27 09:29:22 +0100 |
| commit | 793f7b12a0c95e7bfec1badf9628043fb78fd440 (patch) | |
| tree | 1ace93d9f2bbed43b4594e6bacf75c51ffebf417 /kernel/irq | |
| parent | sparseirq: do not printk when migrating IRQ descriptors (diff) | |
| download | linux-dev-793f7b12a0c95e7bfec1badf9628043fb78fd440.tar.xz linux-dev-793f7b12a0c95e7bfec1badf9628043fb78fd440.zip | |
sparseirq: fix desc->lock init
Impact: cleanup
init_one_irq_desc() does not initialize the desc->lock properly -
you cannot init a lock by memcpying some other lock on it.
This happens to work right now (because irq_desc_init is never in use),
but it's a dangerous construct nevertheless, so fix it.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/handle.c | 2 | ||||
| -rw-r--r-- | kernel/irq/numa_migrate.c | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index 06b05a4d3007..893da67b7781 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -93,6 +93,8 @@ void __attribute__((weak)) arch_init_chip_data(struct irq_desc *desc, int cpu) static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu) { memcpy(desc, &irq_desc_init, sizeof(struct irq_desc)); + + spin_lock_init(&desc->lock); desc->irq = irq; #ifdef CONFIG_SMP desc->cpu = cpu; diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c index a565ce3a4fb5..ecf765c6a77a 100644 --- a/kernel/irq/numa_migrate.c +++ b/kernel/irq/numa_migrate.c @@ -42,6 +42,7 @@ static void init_copy_one_irq_desc(int irq, struct irq_desc *old_desc, struct irq_desc *desc, int cpu) { memcpy(desc, old_desc, sizeof(struct irq_desc)); + spin_lock_init(&desc->lock); desc->cpu = cpu; lockdep_set_class(&desc->lock, &irq_desc_lock_class); init_copy_kstat_irqs(old_desc, desc, cpu, nr_cpu_ids); |