arch/mips/kernel/irq.c

File Facts

System

Linux kernel

Corpus path

arch/mips/kernel/irq.c

Extension

.c

Size

2672 bytes

Lines

120

Domain

Architecture Layer

Bucket

arch/mips

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/delay.h
• linux/init.h
• linux/interrupt.h
• linux/kernel_stat.h
• linux/proc_fs.h
• linux/mm.h
• linux/random.h
• linux/sched.h
• linux/seq_file.h
• linux/kallsyms.h
• linux/kgdb.h
• linux/ftrace.h
• linux/irqdomain.h
• linux/atomic.h
• linux/uaccess.h

Detected Declarations

• function ack_bad_irq
• function arch_show_interrupts
• function spurious_interrupt
• function init_IRQ
• function for_each_possible_cpu
• function check_stack_overflow
• function check_stack_overflow
• function do_domain_IRQ

Annotated Snippet

static inline void check_stack_overflow(void) {}
#endif


/*
 * do_IRQ handles all normal device IRQ's (the special
 * SMP cross-CPU interrupts have their own specific
 * handlers).
 */
asmlinkage void __irq_entry do_IRQ(unsigned int irq)
{
	irq_enter();
	check_stack_overflow();
	generic_handle_irq(irq);
	irq_exit();
}

#ifdef CONFIG_IRQ_DOMAIN
void __irq_entry do_domain_IRQ(struct irq_domain *domain, unsigned int hwirq)
{
	irq_enter();
	check_stack_overflow();
	generic_handle_domain_irq(domain, hwirq);
	irq_exit();
}
#endif

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/delay.h`, `linux/init.h`, `linux/interrupt.h`, `linux/kernel_stat.h`, `linux/proc_fs.h`, `linux/mm.h`, `linux/random.h`.
• Detected declarations: `function ack_bad_irq`, `function arch_show_interrupts`, `function spurious_interrupt`, `function init_IRQ`, `function for_each_possible_cpu`, `function check_stack_overflow`, `function check_stack_overflow`, `function do_domain_IRQ`.
• Atlas domain: Architecture Layer / arch/mips.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.