arch/powerpc/include/asm/vmalloc.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/vmalloc.h

Extension

.h

Size

554 bytes

Lines

25

Domain

Architecture Layer

Bucket

arch/powerpc

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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.

Dependency Surface

• asm/mmu.h
• asm/page.h

Detected Declarations

• function arch_vmap_pud_supported
• function arch_vmap_pmd_supported

Annotated Snippet

#ifndef _ASM_POWERPC_VMALLOC_H
#define _ASM_POWERPC_VMALLOC_H

#include <asm/mmu.h>
#include <asm/page.h>

#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP

#define arch_vmap_pud_supported arch_vmap_pud_supported
static __always_inline bool arch_vmap_pud_supported(pgprot_t prot)
{
	/* HPT does not cope with large pages in the vmalloc area */
	return radix_enabled();
}

#define arch_vmap_pmd_supported arch_vmap_pmd_supported
static __always_inline bool arch_vmap_pmd_supported(pgprot_t prot)
{
	return radix_enabled();
}

#endif

#endif /* _ASM_POWERPC_VMALLOC_H */

Annotation

• Immediate include surface: `asm/mmu.h`, `asm/page.h`.
• Detected declarations: `function arch_vmap_pud_supported`, `function arch_vmap_pmd_supported`.
• Atlas domain: Architecture Layer / arch/powerpc.
• Implementation status: source implementation candidate.

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.