genirq: Provide config option to disable deprecated code
This option covers now the old chip functions and the irq_desc data fields which are moving to struct irq_data. More stuff will follow. Pretty handy for testing a conversion, whether something broke or not. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu>
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@ -155,6 +155,7 @@ struct irq_data {
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*/
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struct irq_chip {
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const char *name;
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#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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unsigned int (*startup)(unsigned int irq);
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void (*shutdown)(unsigned int irq);
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void (*enable)(unsigned int irq);
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@ -175,7 +176,7 @@ struct irq_chip {
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void (*bus_lock)(unsigned int irq);
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void (*bus_sync_unlock)(unsigned int irq);
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#endif
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unsigned int (*irq_startup)(struct irq_data *data);
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void (*irq_shutdown)(struct irq_data *data);
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void (*irq_enable)(struct irq_data *data);
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@ -225,6 +226,9 @@ struct irq_2_iommu;
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*/
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struct irq_desc {
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#ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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struct irq_data irq_data;
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#else
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/*
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* This union will go away, once we fixed the direct access to
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* irq_desc all over the place. The direct fields are a 1:1
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@ -247,6 +251,8 @@ struct irq_desc {
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#endif
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};
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};
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#endif
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struct timer_rand_state *timer_rand_state;
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unsigned int *kstat_irqs;
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irq_flow_handler_t handle_irq;
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@ -12,6 +12,10 @@ config GENERIC_HARDIRQS
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config GENERIC_HARDIRQS_NO__DO_IRQ
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def_bool y
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# Select this to disable the deprecated stuff
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config GENERIC_HARDIRQS_NO_DEPRECATED
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def_bool n
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# Options selectable by the architecture code
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config HAVE_SPARSE_IRQ
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def_bool n
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@ -324,6 +324,7 @@ static void default_shutdown(struct irq_data *data)
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desc->status |= IRQ_MASKED;
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}
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#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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/* Temporary migration helpers */
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static void compat_irq_mask(struct irq_data *data)
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{
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@ -400,12 +401,14 @@ static void compat_bus_sync_unlock(struct irq_data *data)
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{
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data->chip->bus_sync_unlock(data->irq);
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}
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#endif
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/*
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* Fixup enable/disable function pointers
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*/
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void irq_chip_set_defaults(struct irq_chip *chip)
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{
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#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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/*
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* Compat fixup functions need to be before we set the
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* defaults for enable/disable/startup/shutdown
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@ -418,7 +421,7 @@ void irq_chip_set_defaults(struct irq_chip *chip)
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chip->irq_shutdown = compat_irq_shutdown;
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if (chip->startup)
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chip->irq_startup = compat_irq_startup;
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#endif
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/*
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* The real defaults
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*/
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@ -437,6 +440,8 @@ void irq_chip_set_defaults(struct irq_chip *chip)
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if (!chip->irq_shutdown)
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chip->irq_shutdown = chip->irq_disable != default_disable ?
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chip->irq_disable : default_shutdown;
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#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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if (!chip->end)
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chip->end = dummy_irq_chip.end;
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@ -465,6 +470,7 @@ void irq_chip_set_defaults(struct irq_chip *chip)
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chip->irq_set_wake = compat_irq_set_wake;
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if (chip->retrigger)
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chip->irq_retrigger = compat_irq_retrigger;
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#endif
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}
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static inline void mask_ack_irq(struct irq_desc *desc)
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@ -309,7 +309,12 @@ static unsigned int noop_ret(struct irq_data *data)
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return 0;
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}
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#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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static void compat_noop(unsigned int irq) { }
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#define END_INIT .end = compat_noop
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#else
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#define END_INIT
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#endif
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/*
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* Generic no controller implementation
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@ -321,7 +326,7 @@ struct irq_chip no_irq_chip = {
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.irq_enable = noop,
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.irq_disable = noop,
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.irq_ack = ack_bad,
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.end = compat_noop,
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END_INIT
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};
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/*
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@ -337,7 +342,7 @@ struct irq_chip dummy_irq_chip = {
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.irq_ack = noop,
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.irq_mask = noop,
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.irq_unmask = noop,
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.end = compat_noop,
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END_INIT
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};
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/*
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@ -42,6 +42,16 @@ extern int irq_select_affinity_usr(unsigned int irq);
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extern void irq_set_thread_affinity(struct irq_desc *desc);
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#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
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static inline void irq_end(unsigned int irq, struct irq_desc *desc)
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{
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if (desc->irq_data.chip && desc->irq_data.chip->end)
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desc->irq_data.chip->end(irq);
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}
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#else
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static inline void irq_end(unsigned int irq, struct irq_desc *desc) { }
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#endif
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/* Inline functions for support of irq chips on slow busses */
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static inline void chip_bus_lock(struct irq_desc *desc)
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{
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@ -14,6 +14,8 @@
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#include <linux/moduleparam.h>
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#include <linux/timer.h>
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#include "internals.h"
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static int irqfixup __read_mostly;
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#define POLL_SPURIOUS_IRQ_INTERVAL (HZ/10)
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@ -78,8 +80,8 @@ static int try_one_irq(int irq, struct irq_desc *desc)
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* If we did actual work for the real IRQ line we must let the
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* IRQ controller clean up too
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*/
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if (work && desc->irq_data.chip && desc->irq_data.chip->end)
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desc->irq_data.chip->end(irq);
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if (work)
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irq_end(irq, desc);
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raw_spin_unlock(&desc->lock);
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return ok;
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