Messages in this thread Patch in this message | | | Date | Tue, 19 Oct 2010 01:21:23 +0400 | From | Cyrill Gorcunov <> | Subject | [PATCH -tip] x86, io-apic: Simplify ioapic_register_intr |
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Instead of setting IRQ_LEVEL flag early and then check for IRQ being remapped and spread set_irq_chip_and_handler_name over function body several times, defer IRQ_LEVEL setting and save irq_chip in local variable with subsequent call depending on IRQ level. This seems to be more natural and easier to read in result.
And 'trigger' parameter has int type, not long.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> ---
Please review, thanks! Complains are welcome.
arch/x86/kernel/apic/io_apic.c | 37 ++++++++++++++----------------------- 1 files changed, 14 insertions(+), 23 deletions(-)
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 98c27b3..af5c911 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1228,35 +1228,26 @@ static inline int IO_APIC_irq_trigger(int irq) } #endif -static void ioapic_register_intr(unsigned int irq, unsigned long trigger) +static void ioapic_register_intr(unsigned int irq, int trigger) { - - if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || - trigger == IOAPIC_LEVEL) - irq_set_status_flags(irq, IRQ_LEVEL); - else - irq_clear_status_flags(irq, IRQ_LEVEL); + struct irq_chip *chip; if (irq_remapped(get_irq_chip_data(irq))) { irq_set_status_flags(irq, IRQ_MOVE_PCNTXT); - if (trigger) - set_irq_chip_and_handler_name(irq, &ir_ioapic_chip, - handle_fasteoi_irq, - "fasteoi"); - else - set_irq_chip_and_handler_name(irq, &ir_ioapic_chip, - handle_edge_irq, "edge"); - return; - } + chip = &ir_ioapic_chip; + } else + chip = &ioapic_chip; if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || - trigger == IOAPIC_LEVEL) - set_irq_chip_and_handler_name(irq, &ioapic_chip, - handle_fasteoi_irq, - "fasteoi"); - else - set_irq_chip_and_handler_name(irq, &ioapic_chip, - handle_edge_irq, "edge"); + trigger == IOAPIC_LEVEL) { + irq_set_status_flags(irq, IRQ_LEVEL); + set_irq_chip_and_handler_name(irq, chip, + handle_fasteoi_irq, "fasteoi"); + } else { + irq_clear_status_flags(irq, IRQ_LEVEL); + set_irq_chip_and_handler_name(irq, chip, + handle_edge_irq, "edge"); + } } static int setup_ioapic_entry(int apic_id, int irq, -- 1.7.3
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