arch/arm/lib/uaccess_with_memcpy.c
Source file repositories/reference/linux-study-clean/arch/arm/lib/uaccess_with_memcpy.c
File Facts
- System
- Linux kernel
- Corpus path
arch/arm/lib/uaccess_with_memcpy.c- Extension
.c- Size
- 6356 bytes
- Lines
- 283
- 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.
- Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
- 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/kernel.hlinux/ctype.hlinux/uaccess.hlinux/rwsem.hlinux/mm.hlinux/sched.hlinux/hardirq.hlinux/gfp.hlinux/highmem.hlinux/hugetlb.hasm/current.hasm/page.hlinux/vmalloc.h
Detected Declarations
function Copyrightfunction __copy_to_user_memcpyfunction arm_copy_to_userfunction __clear_user_memsetfunction arm_clear_userfunction sched_clockmodule init test_size_treshold
Annotated Snippet
subsys_initcall(test_size_treshold);
#endifAnnotation
- Immediate include surface: `linux/kernel.h`, `linux/ctype.h`, `linux/uaccess.h`, `linux/rwsem.h`, `linux/mm.h`, `linux/sched.h`, `linux/hardirq.h`, `linux/gfp.h`.
- Detected declarations: `function Copyright`, `function __copy_to_user_memcpy`, `function arm_copy_to_user`, `function __clear_user_memset`, `function arm_clear_user`, `function sched_clock`, `module init test_size_treshold`.
- Atlas domain: Architecture Layer / arch/arm.
- Implementation status: integration implementation candidate.
- This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
- 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.