arch/riscv/include/asm/irq_stack.h

Source file repositories/reference/linux-study-clean/arch/riscv/include/asm/irq_stack.h

File Facts

System
Linux kernel
Corpus path
arch/riscv/include/asm/irq_stack.h
Extension
.h
Size
843 bytes
Lines
34
Domain
Architecture Layer
Bucket
arch/riscv
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_RISCV_IRQ_STACK_H
#define _ASM_RISCV_IRQ_STACK_H

#include <linux/bug.h>
#include <linux/gfp.h>
#include <linux/kconfig.h>
#include <linux/vmalloc.h>
#include <linux/pgtable.h>
#include <asm/thread_info.h>

DECLARE_PER_CPU(ulong *, irq_stack_ptr);

asmlinkage void call_on_irq_stack(struct pt_regs *regs,
				  void (*func)(struct pt_regs *));

#ifdef CONFIG_VMAP_STACK
/*
 * To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd
 * stacks need to have the same alignment.
 */
static inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node)
{
	void *p;

	p = __vmalloc_node(stack_size, THREAD_ALIGN, THREADINFO_GFP, node,
			__builtin_return_address(0));
	return kasan_reset_tag(p);
}
#endif /* CONFIG_VMAP_STACK */

#endif /* _ASM_RISCV_IRQ_STACK_H */

Annotation

Implementation Notes