Commit-ID: f841d792e38f75f5e25b0b66f7b5d235d180a735 Gitweb: http://git.kernel.org/tip/f841d792e38f75f5e25b0b66f7b5d235d180a735 Author: Jiang Liu <liuj97@xxxxxxxxx> AuthorDate: Fri, 30 Mar 2012 23:11:35 +0800 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Thu, 24 May 2012 23:16:33 +0200 x86: Return IRQ_SET_MASK_OK_NOCOPY from irq affinity functions The interrupt chip irq_set_affinity() functions copy the affinity mask to irq_data->affinity but return 0, i.e. IRQ_SET_MASK_OK. IRQ_SET_MASK_OK causes the core code to do another redundant copy. Return IRQ_SET_MASK_OK_NOCOPY to avoid this. Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx> Cc: Suresh Siddha <suresh.b.siddha@xxxxxxxxx> Cc: Yinghai Lu <yinghai@xxxxxxxxxx> Cc: Naga Chumbalkar <nagananda.chumbalkar@xxxxxx> Cc: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx> Cc: Cliff Wickman <cpw@xxxxxxx> Cc: Jiang Liu <liuj97@xxxxxxxxx> Cc: Keping Chen <chenkeping@xxxxxxxxxx> Link: http://lkml.kernel.org/r/1333120296-13563-4-git-send-email-jiang.liu@xxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- arch/x86/kernel/apic/io_apic.c | 9 +++++---- arch/x86/platform/uv/uv_irq.c | 2 +- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index ac96561..bce2001 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -2270,6 +2270,7 @@ ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask, /* Only the high 8 bits are valid. */ dest = SET_APIC_LOGICAL_ID(dest); __target_IO_APIC_irq(irq, dest, data->chip_data); + ret = IRQ_SET_MASK_OK_NOCOPY; } raw_spin_unlock_irqrestore(&ioapic_lock, flags); return ret; @@ -3092,7 +3093,7 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) __write_msi_msg(data->msi_desc, &msg); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } #endif /* CONFIG_SMP */ @@ -3214,7 +3215,7 @@ dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, dmar_msi_write(irq, &msg); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } #endif /* CONFIG_SMP */ @@ -3267,7 +3268,7 @@ static int hpet_msi_set_affinity(struct irq_data *data, hpet_msi_write(data->handler_data, &msg); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } #endif /* CONFIG_SMP */ @@ -3340,7 +3341,7 @@ ht_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) return -1; target_ht_irq(data->irq, dest, cfg->vector); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } #endif diff --git a/arch/x86/platform/uv/uv_irq.c b/arch/x86/platform/uv/uv_irq.c index f25c276..a22c416 100644 --- a/arch/x86/platform/uv/uv_irq.c +++ b/arch/x86/platform/uv/uv_irq.c @@ -222,7 +222,7 @@ uv_set_irq_affinity(struct irq_data *data, const struct cpumask *mask, if (cfg->move_in_progress) send_cleanup_vector(cfg); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } /* -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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