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| author | David S. Miller <davem@davemloft.net> | 2016-03-19 21:05:24 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-19 21:05:24 -0400 |
| commit | c78a85a8430e35aecd53e190a2f6b999062b1037 (patch) | |
| tree | fbd69827579db437492fb77b5faa53814114bed3 /kernel/irq/irqdesc.c | |
| parent | 133800d1f0288b9ddfc0d0aded10d9efa82d5b8c (diff) | |
| parent | de06dbfa7861c9019eedefc0c356ba86e5098f1b (diff) | |
| download | linux-stable-c78a85a8430e35aecd53e190a2f6b999062b1037.tar.gz linux-stable-c78a85a8430e35aecd53e190a2f6b999062b1037.tar.bz2 linux-stable-c78a85a8430e35aecd53e190a2f6b999062b1037.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
Diffstat (limited to 'kernel/irq/irqdesc.c')
| -rw-r--r-- | kernel/irq/irqdesc.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 0409da0bcc33..0ccd028817d7 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -24,10 +24,27 @@ static struct lock_class_key irq_desc_lock_class; #if defined(CONFIG_SMP) +static int __init irq_affinity_setup(char *str) +{ + zalloc_cpumask_var(&irq_default_affinity, GFP_NOWAIT); + cpulist_parse(str, irq_default_affinity); + /* + * Set at least the boot cpu. We don't want to end up with + * bugreports caused by random comandline masks + */ + cpumask_set_cpu(smp_processor_id(), irq_default_affinity); + return 1; +} +__setup("irqaffinity=", irq_affinity_setup); + static void __init init_irq_default_affinity(void) { - alloc_cpumask_var(&irq_default_affinity, GFP_NOWAIT); - cpumask_setall(irq_default_affinity); +#ifdef CONFIG_CPUMASK_OFFSTACK + if (!irq_default_affinity) + zalloc_cpumask_var(&irq_default_affinity, GFP_NOWAIT); +#endif + if (cpumask_empty(irq_default_affinity)) + cpumask_setall(irq_default_affinity); } #else static void __init init_irq_default_affinity(void) |