kernel/resource_kunit.c
Source file repositories/reference/linux-study-clean/kernel/resource_kunit.c
File Facts
- System
- Linux kernel
- Corpus path
kernel/resource_kunit.c- Extension
.c- Size
- 10523 bytes
- Lines
- 307
- Domain
- Core OS
- Bucket
- Scheduler, Processes, Timers, Sync, And Syscalls
- 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.
- 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
kunit/test.hlinux/ioport.hlinux/kernel.hlinux/string.hlinux/sizes.hlinux/mm.h
Detected Declarations
struct resultfunction resource_do_testfunction resource_do_union_testfunction resource_test_unionfunction resource_do_intersection_testfunction resource_test_intersectionfunction remove_free_resourcefunction resource_test_add_action_or_abortfunction resource_test_request_regionfunction resource_test_insert_resourcefunction resource_test_region_intersects
Annotated Snippet
struct result {
struct resource *r1;
struct resource *r2;
struct resource r;
bool ret;
};
static struct result results_for_union[] = {
{
.r1 = &r1, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
}, {
.r1 = &r2, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
}, {
.r1 = &r3, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
}, {
.r1 = &r4, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
}, {
.r1 = &r2, .r2 = &r1, .ret = false,
}, {
.r1 = &r3, .r2 = &r1, .ret = false,
}, {
.r1 = &r4, .r2 = &r1, .r.start = R1_START, .r.end = R4_END, .ret = true,
}, {
.r1 = &r2, .r2 = &r3, .ret = false,
}, {
.r1 = &r2, .r2 = &r4, .r.start = R4_START, .r.end = R4_END, .ret = true,
}, {
.r1 = &r3, .r2 = &r4, .r.start = R4_START, .r.end = R3_END, .ret = true,
},
};
static struct result results_for_intersection[] = {
{
.r1 = &r1, .r2 = &r0, .r.start = R1_START, .r.end = R1_END, .ret = true,
}, {
.r1 = &r2, .r2 = &r0, .r.start = R2_START, .r.end = R2_END, .ret = true,
}, {
.r1 = &r3, .r2 = &r0, .r.start = R3_START, .r.end = R3_END, .ret = true,
}, {
.r1 = &r4, .r2 = &r0, .r.start = R4_START, .r.end = R4_END, .ret = true,
}, {
.r1 = &r2, .r2 = &r1, .ret = false,
}, {
.r1 = &r3, .r2 = &r1, .ret = false,
}, {
.r1 = &r4, .r2 = &r1, .r.start = R4_START, .r.end = R1_END, .ret = true,
}, {
.r1 = &r2, .r2 = &r3, .ret = false,
}, {
.r1 = &r2, .r2 = &r4, .r.start = R2_START, .r.end = R2_END, .ret = true,
}, {
.r1 = &r3, .r2 = &r4, .r.start = R3_START, .r.end = R4_END, .ret = true,
},
};
static void resource_do_test(struct kunit *test, bool ret, struct resource *r,
bool exp_ret, struct resource *exp_r,
struct resource *r1, struct resource *r2)
{
KUNIT_EXPECT_EQ_MSG(test, ret, exp_ret, "Resources %pR %pR", r1, r2);
KUNIT_EXPECT_EQ_MSG(test, r->start, exp_r->start, "Start elements are not equal");
KUNIT_EXPECT_EQ_MSG(test, r->end, exp_r->end, "End elements are not equal");
}
static void resource_do_union_test(struct kunit *test, struct result *r)
{
struct resource result;
bool ret;
memset(&result, 0, sizeof(result));
ret = resource_union(r->r1, r->r2, &result);
resource_do_test(test, ret, &result, r->ret, &r->r, r->r1, r->r2);
memset(&result, 0, sizeof(result));
ret = resource_union(r->r2, r->r1, &result);
resource_do_test(test, ret, &result, r->ret, &r->r, r->r2, r->r1);
}
static void resource_test_union(struct kunit *test)
{
struct result *r = results_for_union;
unsigned int i = 0;
do {
resource_do_union_test(test, &r[i]);
} while (++i < ARRAY_SIZE(results_for_union));
}
static void resource_do_intersection_test(struct kunit *test, struct result *r)
{
Annotation
- Immediate include surface: `kunit/test.h`, `linux/ioport.h`, `linux/kernel.h`, `linux/string.h`, `linux/sizes.h`, `linux/mm.h`.
- Detected declarations: `struct result`, `function resource_do_test`, `function resource_do_union_test`, `function resource_test_union`, `function resource_do_intersection_test`, `function resource_test_intersection`, `function remove_free_resource`, `function resource_test_add_action_or_abort`, `function resource_test_request_region`, `function resource_test_insert_resource`.
- Atlas domain: Core OS / Scheduler, Processes, Timers, Sync, And Syscalls.
- 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.