mm/gup_test.h

File Facts

System

Linux kernel

Corpus path

mm/gup_test.h

Extension

.h

Size

1261 bytes

Lines

46

Domain

Core OS

Bucket

Memory Management

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct gup_test
• struct pin_longterm_test

Annotated Snippet

struct gup_test {
	__u64 get_delta_usec;
	__u64 put_delta_usec;
	__u64 addr;
	__u64 size;
	__u32 nr_pages_per_call;
	__u32 gup_flags;
	__u32 test_flags;
	/*
	 * Each non-zero entry is the number of the page (1-based: first page is
	 * page 1, so that zero entries mean "do nothing") from the .addr base.
	 */
	__u32 which_pages[GUP_TEST_MAX_PAGES_TO_DUMP];
};

#define PIN_LONGTERM_TEST_FLAG_USE_WRITE	1
#define PIN_LONGTERM_TEST_FLAG_USE_FAST		2

struct pin_longterm_test {
	__u64 addr;
	__u64 size;
	__u32 flags;
};

#endif	/* __GUP_TEST_H */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct gup_test`, `struct pin_longterm_test`.
• Atlas domain: Core OS / Memory Management.
• 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.