arch/arm/mm/copypage-v6.c
Source file repositories/reference/linux-study-clean/arch/arm/mm/copypage-v6.c
File Facts
- System
- Linux kernel
- Corpus path
arch/arm/mm/copypage-v6.c- Extension
.c- Size
- 3421 bytes
- Lines
- 139
- Domain
- Architecture Layer
- Bucket
- arch/arm
- Inferred role
- Architecture Layer: exported/initcall integration point
- Status
- integration 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.
- Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
- Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/init.hlinux/spinlock.hlinux/mm.hlinux/highmem.hlinux/pagemap.hasm/shmparam.hasm/tlbflush.hasm/cacheflush.hasm/cachetype.hmm.h
Detected Declarations
function v6_copy_user_highpage_nonaliasingfunction v6_clear_user_highpage_nonaliasingfunction discard_old_kernel_datafunction v6_copy_user_highpage_aliasingfunction v6_clear_user_highpage_aliasingfunction v6_userpage_initmodule init v6_userpage_init
Annotated Snippet
core_initcall(v6_userpage_init);Annotation
- Immediate include surface: `linux/init.h`, `linux/spinlock.h`, `linux/mm.h`, `linux/highmem.h`, `linux/pagemap.h`, `asm/shmparam.h`, `asm/tlbflush.h`, `asm/cacheflush.h`.
- Detected declarations: `function v6_copy_user_highpage_nonaliasing`, `function v6_clear_user_highpage_nonaliasing`, `function discard_old_kernel_data`, `function v6_copy_user_highpage_aliasing`, `function v6_clear_user_highpage_aliasing`, `function v6_userpage_init`, `module init v6_userpage_init`.
- Atlas domain: Architecture Layer / arch/arm.
- Implementation status: integration 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.