/* * linux/kernel/irq/resend.c * * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar * Copyright (C) 2005-2006, Thomas Gleixner * * This file contains the IRQ-resend code * * If the interrupt is waiting to be processed, we try to re-run it. * We can't directly run it from here since the caller might be in an * interrupt-protected region. Not all irq controller chips can * retrigger interrupts at the hardware level, so in those cases * we allow the resending of IRQs via a tasklet. */ #include #include #include #include #include "internals.h" #ifdef CONFIG_HARDIRQS_SW_RESEND /* Bitmap to handle software resend of interrupts: */ static DECLARE_BITMAP(irqs_resend, IRQ_BITMAP_BITS); /* * Run software resends of IRQ's */ static void resend_irqs(unsigned long arg) { struct irq_desc *desc; int irq; while (!bitmap_empty(irqs_resend, nr_irqs)) { irq = find_first_bit(irqs_resend, nr_irqs); clear_bit(irq, irqs_resend); desc = irq_to_desc(irq); local_irq_disable(); desc->handle_irq(desc); local_irq_enable(); } } /* Tasklet to handle resend: */ static DECLARE_TASKLET(resend_tasklet, resend_irqs, 0); #endif /* * IRQ resend * * Is called with interrupts disabled and desc->lock held. */ void check_irq_resend(struct irq_desc *desc) { /* * We do not resend level type interrupts. Level type * interrupts are resent by hardware when they are still * active. Clear the pending bit so suspend/resume does not * get confused. */ if (irq_settings_is_level(desc)) { desc->istate &= ~IRQS_PENDING; return; } if (desc->istate & IRQS_REPLAY) return; if (desc->istate & IRQS_PENDING) { desc->istate &= ~IRQS_PENDING; desc->istate |= IRQS_REPLAY; if (!desc->irq_data.chip->irq_retrigger || !desc->irq_data.chip->irq_retrigger(&desc->irq_data)) { #ifdef CONFIG_HARDIRQS_SW_RESEND unsigned int irq = irq_desc_get_irq(desc); /* * If the interrupt is running in the thread * context of the parent irq we need to be * careful, because we cannot trigger it * directly. */ if (irq_settings_is_nested_thread(desc)) { /* * If the parent_irq is valid, we * retrigger the parent, otherwise we * do nothing. */ if (!desc->parent_irq) return; irq = desc->parent_irq; } /* Set it pending and activate the softirq: */ set_bit(irq, irqs_resend); tasklet_schedule(&resend_tasklet); #endif } } } 'txt' type='search' size='10' name='q' value=''/>
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authorBhumika Goyal <bhumirks@gmail.com>2017-01-25 00:54:07 +0530
committerDan Williams <dan.j.williams@intel.com>2017-01-31 18:16:30 -0800
commit970d14e3989160ee9e97c7d75ecbc893fd29dab9 (patch)
tree4a731cac4efedb17f86a912ec56c151d26792abe /include/net/netns
parent7a308bb3016f57e5be11a677d15b821536419d36 (diff)
nvdimm: constify device_type structures
Declare device_type structure as const as it is only stored in the type field of a device structure. This field is of type const, so add const to declaration of device_type structure. File size before: text data bss dec hex filename 19278 3199 16 22493 57dd nvdimm/namespace_devs.o File size after: text data bss dec hex filename 19929 3160 16 23105 5a41 nvdimm/namespace_devs.o Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/net/netns')