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pci_check_and_unmask_intx(9) [centos man page]

PCI_CHECK_AND_UNMASK(9) 					Hardware Interfaces					   PCI_CHECK_AND_UNMASK(9)

NAME
pci_check_and_unmask_intx - unmask INTx of no interrupt is pending SYNOPSIS
bool pci_check_and_unmask_intx(struct pci_dev * dev); ARGUMENTS
dev the PCI device to operate on DESCRIPTION
Check if the device dev has its INTx line asserted, unmask it if not and return true. False is returned and the mask remains active if there was still an interrupt pending. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 PCI_CHECK_AND_UNMASK(9)

Check Out this Related Man Page

STRUCT 
IRQ_CHIP(9) Structures STRUCT IRQ_CHIP(9) NAME
struct_irq_chip - hardware interrupt chip descriptor SYNOPSIS
struct irq_chip { const char * name; unsigned int (* startup) (unsigned int irq); void (* shutdown) (unsigned int irq); void (* enable) (unsigned int irq); void (* disable) (unsigned int irq); void (* ack) (unsigned int irq); void (* mask) (unsigned int irq); void (* mask_ack) (unsigned int irq); void (* unmask) (unsigned int irq); void (* eoi) (unsigned int irq); void (* end) (unsigned int irq); int (* set_affinity) (unsigned int irq,const struct cpumask *dest); int (* retrigger) (unsigned int irq); int (* set_type) (unsigned int irq, unsigned int flow_type); int (* set_wake) (unsigned int irq, unsigned int on); void (* bus_lock) (unsigned int irq); void (* bus_sync_unlock) (unsigned int irq); #ifdef CONFIG_IRQ_RELEASE_METHOD void (* release) (unsigned int irq, void *dev_id); #endif const char * typename; }; MEMBERS
name name for /proc/interrupts startup start up the interrupt (defaults to ->enable if NULL) shutdown shut down the interrupt (defaults to ->disable if NULL) enable enable the interrupt (defaults to chip->unmask if NULL) disable disable the interrupt ack start of a new interrupt mask mask an interrupt source mask_ack ack and mask an interrupt source unmask unmask an interrupt source eoi end of interrupt - chip level end end of interrupt - flow level set_affinity set the CPU affinity on SMP machines retrigger resend an IRQ to the CPU set_type set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ set_wake enable/disable power-management wake-on of an IRQ bus_lock function to lock access to slow bus (i2c) chips bus_sync_unlock function to sync and unlock slow bus (i2c) chips release release function solely used by UML typename obsoleted by name, kept as migration helper AUTHORS
Thomas Gleixner <tglx@linutronix.de> Author. Ingo Molnar <mingo@elte.hu> Author. COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 STRUCT IRQ_CHIP(9)

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