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Date: Thu, 4 Mar 2010 16:10:57 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: Yinghai Lu <yinghai@...nel.org>
cc: Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Suresh Siddha <suresh.b.siddha@...el.com>,
Eric Biederman <ebiederm@...ssion.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/12] x86: make irq_chip to use desc_mask instead of
maskn
On Thu, 4 Mar 2010, Yinghai Lu wrote:
> core irq_chip ...
>
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> ---
> arch/x86/include/asm/i8259.h | 2 +-
> arch/x86/include/asm/irq.h | 4 +-
> arch/x86/kernel/apic/io_apic.c | 314 ++++++++++++++++------------------------
> arch/x86/kernel/i8259.c | 45 +++---
> arch/x86/kernel/irq.c | 19 ++-
> 5 files changed, 165 insertions(+), 219 deletions(-)
>
> diff --git a/arch/x86/include/asm/i8259.h b/arch/x86/include/asm/i8259.h
> index 1655147..0b2ad6f 100644
> --- a/arch/x86/include/asm/i8259.h
> +++ b/arch/x86/include/asm/i8259.h
> @@ -58,7 +58,7 @@ struct legacy_pic {
> void (*mask_all)(void);
> void (*restore_mask)(void);
> void (*init)(int auto_eoi);
> - int (*irq_pending)(unsigned int irq);
> + int (*irq_pending)(struct irq_desc *desc);
> void (*make_irq)(unsigned int irq);
> };
>
> diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
> index 64c5f6f..078e449 100644
> --- a/arch/x86/include/asm/irq.h
> +++ b/arch/x86/include/asm/irq.h
> @@ -31,15 +31,15 @@ static inline int irq_canonicalize(int irq)
> # endif
> #endif
>
> +struct irq_desc;
> #ifdef CONFIG_HOTPLUG_CPU
> #include <linux/cpumask.h>
> extern void fixup_irqs(void);
> -extern void irq_force_complete_move(int);
> +void irq_force_complete_move(struct irq_desc *desc);
> #endif
>
> extern void (*x86_platform_ipi_callback)(void);
> extern void native_init_IRQ(void);
> -struct irq_desc;
> extern bool handle_irq(struct irq_desc *desc, struct pt_regs *regs);
>
> extern unsigned int do_IRQ(struct pt_regs *regs);
> diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
> index ddcf4fa..44fc842 100644
> --- a/arch/x86/kernel/apic/io_apic.c
> +++ b/arch/x86/kernel/apic/io_apic.c
> @@ -176,18 +176,6 @@ int __init arch_early_irq_init(void)
> }
>
> #ifdef CONFIG_SPARSE_IRQ
> -struct irq_cfg *irq_cfg(unsigned int irq)
> -{
> - struct irq_cfg *cfg = NULL;
> - struct irq_desc *desc;
> -
> - desc = irq_to_desc(irq);
> - if (desc)
> - cfg = desc->chip_data;
> -
> - return cfg;
> -}
> -
> static struct irq_cfg *get_one_free_irq_cfg(int node)
> {
> struct irq_cfg *cfg;
> @@ -326,13 +314,6 @@ void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc)
> }
> }
> /* end for move_irq_desc */
> -
> -#else
> -struct irq_cfg *irq_cfg(unsigned int irq)
> -{
> - return irq < nr_irqs ? irq_cfgx + irq : NULL;
> -}
> -
> #endif
>
> struct io_apic {
> @@ -580,7 +561,7 @@ static void __mask_IO_APIC_irq(struct irq_cfg *cfg)
> io_apic_modify_irq(cfg, ~0, IO_APIC_REDIR_MASKED, &io_apic_sync);
> }
>
> -static void mask_IO_APIC_irq_desc(struct irq_desc *desc)
> +static void mask_IO_APIC_irq(struct irq_desc *desc)
> {
> struct irq_cfg *cfg = desc->chip_data;
> unsigned long flags;
> @@ -592,7 +573,7 @@ static void mask_IO_APIC_irq_desc(struct irq_desc *desc)
> raw_spin_unlock_irqrestore(&ioapic_lock, flags);
> }
>
> -static void unmask_IO_APIC_irq_desc(struct irq_desc *desc)
> +static void unmask_IO_APIC_irq(struct irq_desc *desc)
> {
> struct irq_cfg *cfg = desc->chip_data;
> unsigned long flags;
> @@ -602,19 +583,6 @@ static void unmask_IO_APIC_irq_desc(struct irq_desc *desc)
> raw_spin_unlock_irqrestore(&ioapic_lock, flags);
> }
>
> -static void mask_IO_APIC_irq(unsigned int irq)
> -{
> - struct irq_desc *desc = irq_to_desc(irq);
> -
> - mask_IO_APIC_irq_desc(desc);
> -}
> -static void unmask_IO_APIC_irq(unsigned int irq)
> -{
> - struct irq_desc *desc = irq_to_desc(irq);
> -
> - unmask_IO_APIC_irq_desc(desc);
> -}
> -
> static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin)
> {
> struct IO_APIC_route_entry entry;
> @@ -1470,7 +1438,7 @@ static void setup_IO_APIC_irq(int apic_id, int pin, unsigned int irq, struct irq
>
> ioapic_register_intr(irq, desc, trigger);
> if (irq < legacy_pic->nr_legacy_irqs)
> - legacy_pic->chip->mask(irq);
> + desc_chip_mask(legacy_pic->chip, irq, desc);
>
> ioapic_write_entry(apic_id, pin, entry);
> }
> @@ -2267,29 +2235,29 @@ static int __init timer_irq_works(void)
> * an edge even if it isn't on the 8259A...
> */
>
> -static unsigned int startup_ioapic_irq(unsigned int irq)
> +static unsigned int startup_ioapic_irq(struct irq_desc *desc)
> {
> int was_pending = 0;
> unsigned long flags;
> struct irq_cfg *cfg;
>
> raw_spin_lock_irqsave(&ioapic_lock, flags);
> - if (irq < legacy_pic->nr_legacy_irqs) {
> - legacy_pic->chip->mask(irq);
> - if (legacy_pic->irq_pending(irq))
> + if (desc->irq < legacy_pic->nr_legacy_irqs) {
> + desc_chip_mask(legacy_pic->chip, -1, desc);
> + if (legacy_pic->irq_pending(desc))
> was_pending = 1;
> }
> - cfg = irq_cfg(irq);
> + cfg = desc->chip_data;
get_irq_desc_chip_data(desc); please
> __unmask_IO_APIC_irq(cfg);
> raw_spin_unlock_irqrestore(&ioapic_lock, flags);
>
> return was_pending;
> }
>
> -static int ioapic_retrigger_irq(unsigned int irq)
> +static int ioapic_retrigger_irq(struct irq_desc *desc)
> {
>
> - struct irq_cfg *cfg = irq_cfg(irq);
> + struct irq_cfg *cfg = desc->chip_data;
Ditto
> unsigned long flags;
> -static void __irq_complete_move(struct irq_desc **descp, unsigned vector)
> -{
> - struct irq_desc *desc = *descp;
Who merged that particular piece of horror ?
> -static void __irq_complete_move(struct irq_desc **descp, unsigned vector)
> +static void __irq_complete_move(struct irq_desc *desc, unsigned vector)
> {
> - struct irq_desc *desc = *descp;
> struct irq_cfg *cfg = desc->chip_data;
That should be fixed as well and probably at some other places.
> * MSI message composition
> */
> #ifdef CONFIG_PCI_MSI
> -static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq,
> +static int msi_compose_msg(struct pci_dev *pdev, struct irq_desc *desc,
> struct msi_msg *msg, u8 hpet_id)
> {
> - struct irq_desc *desc;
> + unsigned int irq = desc->irq;
Please separate out unrelated changes. This has nothing to do with
the irq chip implementation.
>
> /*
> @@ -3540,8 +3482,9 @@ static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq)
> {
> int ret;
> struct msi_msg msg;
> + struct irq_desc *desc = irq_to_desc(irq);
Ditto
>
> - ret = msi_compose_msg(dev, irq, &msg, -1);
> + ret = msi_compose_msg(dev, desc, &msg, -1);
> if (ret < 0)
> return ret;
>
> @@ -3549,7 +3492,6 @@ static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq)
> write_msi_msg(irq, &msg);
>
> if (irq_remapped(irq)) {
> - struct irq_desc *desc = irq_to_desc(irq);
> /*
> * irq migration in process context
> */
> @@ -3631,9 +3573,8 @@ void arch_teardown_msi_irq(unsigned int irq)
>
> int arch_setup_dmar_msi(unsigned int irq)
> {
> int ret;
> struct msi_msg msg;
> + struct irq_desc *desc = irq_to_desc(irq);
Ditto
> - ret = msi_compose_msg(NULL, irq, &msg, -1);
> + ret = msi_compose_msg(NULL, desc, &msg, -1);
> if (ret < 0)
> return ret;
> - dmar_msi_write(irq, &msg);
> + dmar_msi_write_desc(desc, &msg);
> set_irq_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq,
> "edge");
> return 0;
> @@ -3686,9 +3628,8 @@ int arch_setup_dmar_msi(unsigned int irq)
> #ifdef CONFIG_HPET_TIMER
> diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
> index f71625c..775cd75 100644
> --- a/arch/x86/kernel/irq.c
> +++ b/arch/x86/kernel/irq.c
> @@ -27,7 +27,7 @@ void (*x86_platform_ipi_callback)(void) = NULL;
> void ack_bad_irq(unsigned int irq)
> {
> if (printk_ratelimit())
> - pr_err("unexpected IRQ trap at vector %02x\n", irq);
> + pr_err("unexpected IRQ trap at irq %02x\n", irq);
Unrelated
Thanks,
tglx
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