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Commit f0ba3d05 authored by Eyal Perry's avatar Eyal Perry Committed by Thomas Gleixner
Browse files

genirq: Provide !SMP stub for irq_set_affinity_notifier() 



Instead of requiring each consumer of the IRQ affinity notifier to have
themselves be explicitly dependent on CONFIG_SMP, make the definition of
struct irq_affinity_notify to exist independently of that config option
and introduce a stub for irq_set_affinity_notifier() under non SMP
configuration.

Fixes: 2eacc23c ("net/mlx4_core: Enforce irq affinity changes
immediatly")

Signed-off-by: default avatarEyal Perry <eyalpe@mellanox.com>
Signed-off-by: default avatarAmir Vadai <amirv@mellanox.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Yevgeny Petrilin <yevgenyp@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: David S. Miller <davem@davemloft.net>
Link: http://lkml.kernel.org/r/1400597820-30685-1-git-send-email-amirv@mellanox.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent d6d211db

include/linux/interrupt.h

+26 −20
Original line number Diff line number Diff line
@@ -199,6 +199,26 @@ extern int check_wakeup_irqs(void); 
static inline int check_wakeup_irqs(void) { return 0; }

#endif



/**

 * struct irq_affinity_notify - context for notification of IRQ affinity changes

 * @irq:		Interrupt to which notification applies

 * @kref:		Reference count, for internal use

 * @work:		Work item, for internal use

 * @notify:		Function to be called on change.  This will be

 *			called in process context.

 * @release:		Function to be called on release.  This will be

 *			called in process context.  Once registered, the

 *			structure must only be freed when this function is

 *			called or later.

 */

struct irq_affinity_notify {

	unsigned int irq;

	struct kref kref;

	struct work_struct work;

	void (*notify)(struct irq_affinity_notify *, const cpumask_t *mask);

	void (*release)(struct kref *ref);

};



#if defined(CONFIG_SMP)



extern cpumask_var_t irq_default_affinity;
@@ -242,26 +262,6 @@ extern int irq_select_affinity(unsigned int irq); 


extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m);



/**

 * struct irq_affinity_notify - context for notification of IRQ affinity changes

 * @irq:		Interrupt to which notification applies

 * @kref:		Reference count, for internal use

 * @work:		Work item, for internal use

 * @notify:		Function to be called on change.  This will be

 *			called in process context.

 * @release:		Function to be called on release.  This will be

 *			called in process context.  Once registered, the

 *			structure must only be freed when this function is

 *			called or later.

 */

struct irq_affinity_notify {

	unsigned int irq;

	struct kref kref;

	struct work_struct work;

	void (*notify)(struct irq_affinity_notify *, const cpumask_t *mask);

	void (*release)(struct kref *ref);

};



extern int

irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
@@ -284,6 +284,12 @@ static inline int irq_set_affinity_hint(unsigned int irq, 
{

	return -EINVAL;

}



static inline int

irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify)

{

	return 0;

}

#endif /* CONFIG_SMP */



/*