arch/um/include/asm/pgtable-2level.h

File Facts

System

Linux kernel

Corpus path

arch/um/include/asm/pgtable-2level.h

Extension

.h

Size

1230 bytes

Lines

43

Domain

Architecture Layer

Bucket

arch/um

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.

Dependency Surface

• asm-generic/pgtable-nopmd.h

Detected Declarations

• function Copyright
• function pgd_mkuptodate

Annotated Snippet

static inline int pgd_needsync(pgd_t pgd)	{ return 0; }
static inline void pgd_mkuptodate(pgd_t pgd)	{ }

#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))

#define pte_pfn(x) phys_to_pfn(pte_val(x))
#define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))

#endif

Annotation

• Immediate include surface: `asm-generic/pgtable-nopmd.h`.
• Detected declarations: `function Copyright`, `function pgd_mkuptodate`.
• Atlas domain: Architecture Layer / arch/um.
• 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.