arch/s390/include/asm/gmap_helpers.h

File Facts

System

Linux kernel

Corpus path

arch/s390/include/asm/gmap_helpers.h

Extension

.h

Size

624 bytes

Lines

18

Domain

Architecture Layer

Bucket

arch/s390

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef _ASM_S390_GMAP_HELPERS_H
#define _ASM_S390_GMAP_HELPERS_H

void gmap_helper_zap_one_page(struct mm_struct *mm, unsigned long vmaddr);
void gmap_helper_discard(struct mm_struct *mm, unsigned long vmaddr, unsigned long end);
int gmap_helper_disable_cow_sharing(void);
void gmap_helper_try_set_pte_unused(struct mm_struct *mm, unsigned long vmaddr);
pte_t *try_get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl);

#endif /* _ASM_S390_GMAP_HELPERS_H */

Annotation

• Atlas domain: Architecture Layer / arch/s390.
• 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.