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linux-torvalds-mirror/kernel/resource_kunit.c
Linus Torvalds bf4afc53b7 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 
This was done entirely with mindless brute force, using

    git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
        xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'

to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.

Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.

For the same reason the 'flex' versions will be done as a separate
conversion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 17:09:51 -08:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Test cases for API provided by resource.c and ioport.h
*/
#include <kunit/test.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/sizes.h>
#include <linux/mm.h>
#define R0_START 0x0000
#define R0_END 0xffff
#define R1_START 0x1234
#define R1_END 0x2345
#define R2_START 0x4567
#define R2_END 0x5678
#define R3_START 0x6789
#define R3_END 0x789a
#define R4_START 0x2000
#define R4_END 0x7000
static struct resource r0 = { .start = R0_START, .end = R0_END };
static struct resource r1 = { .start = R1_START, .end = R1_END };
static struct resource r2 = { .start = R2_START, .end = R2_END };
static struct resource r3 = { .start = R3_START, .end = R3_END };
static struct resource r4 = { .start = R4_START, .end = R4_END };
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)
{
struct resource result;
bool ret;
memset(&result, 0, sizeof(result));
ret = resource_intersection(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_intersection(r->r2, r->r1, &result);
resource_do_test(test, ret, &result, r->ret, &r->r, r->r2, r->r1);
}
static void resource_test_intersection(struct kunit *test)
{
struct result *r = results_for_intersection;
unsigned int i = 0;
do {
resource_do_intersection_test(test, &r[i]);
} while (++i < ARRAY_SIZE(results_for_intersection));
}
/*
* The test resource tree for region_intersects() test:
*
* BASE-BASE+1M-1 : Test System RAM 0
* # hole 0 (BASE+1M-BASE+2M)
* BASE+2M-BASE+3M-1 : Test CXL Window 0
* BASE+3M-BASE+4M-1 : Test System RAM 1
* BASE+4M-BASE+7M-1 : Test CXL Window 1
* BASE+4M-BASE+5M-1 : Test System RAM 2
* BASE+4M+128K-BASE+4M+256K-1: Test Code
* BASE+5M-BASE+6M-1 : Test System RAM 3
*/
#define RES_TEST_RAM0_OFFSET 0
#define RES_TEST_RAM0_SIZE SZ_1M
#define RES_TEST_HOLE0_OFFSET (RES_TEST_RAM0_OFFSET + RES_TEST_RAM0_SIZE)
#define RES_TEST_HOLE0_SIZE SZ_1M
#define RES_TEST_WIN0_OFFSET (RES_TEST_HOLE0_OFFSET + RES_TEST_HOLE0_SIZE)
#define RES_TEST_WIN0_SIZE SZ_1M
#define RES_TEST_RAM1_OFFSET (RES_TEST_WIN0_OFFSET + RES_TEST_WIN0_SIZE)
#define RES_TEST_RAM1_SIZE SZ_1M
#define RES_TEST_WIN1_OFFSET (RES_TEST_RAM1_OFFSET + RES_TEST_RAM1_SIZE)
#define RES_TEST_WIN1_SIZE (SZ_1M * 3)
#define RES_TEST_RAM2_OFFSET RES_TEST_WIN1_OFFSET
#define RES_TEST_RAM2_SIZE SZ_1M
#define RES_TEST_CODE_OFFSET (RES_TEST_RAM2_OFFSET + SZ_128K)
#define RES_TEST_CODE_SIZE SZ_128K
#define RES_TEST_RAM3_OFFSET (RES_TEST_RAM2_OFFSET + RES_TEST_RAM2_SIZE)
#define RES_TEST_RAM3_SIZE SZ_1M
#define RES_TEST_TOTAL_SIZE ((RES_TEST_WIN1_OFFSET + RES_TEST_WIN1_SIZE))
KUNIT_DEFINE_ACTION_WRAPPER(kfree_wrapper, kfree, const void *);
static void remove_free_resource(void *ctx)
{
struct resource *res = (struct resource *)ctx;
remove_resource(res);
kfree(res);
}
static void resource_test_add_action_or_abort(
struct kunit *test, void (*action)(void *), void *ctx)
{
KUNIT_ASSERT_EQ_MSG(test, 0,
kunit_add_action_or_reset(test, action, ctx),
"Fail to add action");
}
static void resource_test_request_region(struct kunit *test, struct resource *parent,
resource_size_t start, resource_size_t size,
const char *name, unsigned long flags)
{
struct resource *res;
res = __request_region(parent, start, size, name, flags);
KUNIT_ASSERT_NOT_NULL(test, res);
resource_test_add_action_or_abort(test, remove_free_resource, res);
}
static void resource_test_insert_resource(struct kunit *test, struct resource *parent,
resource_size_t start, resource_size_t size,
const char *name, unsigned long flags)
{
struct resource *res;
res = kzalloc_obj(*res);
KUNIT_ASSERT_NOT_NULL(test, res);
res->name = name;
res->start = start;
res->end = start + size - 1;
res->flags = flags;
if (insert_resource(parent, res)) {
resource_test_add_action_or_abort(test, kfree_wrapper, res);
KUNIT_FAIL_AND_ABORT(test, "Fail to insert resource %pR\n", res);
}
resource_test_add_action_or_abort(test, remove_free_resource, res);
}
static void resource_test_region_intersects(struct kunit *test)
{
unsigned long flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
struct resource *parent;
resource_size_t start;
/* Find an iomem_resource hole to hold test resources */
parent = alloc_free_mem_region(&iomem_resource, RES_TEST_TOTAL_SIZE, SZ_1M,
"test resources");
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
start = parent->start;
resource_test_add_action_or_abort(test, remove_free_resource, parent);
resource_test_request_region(test, parent, start + RES_TEST_RAM0_OFFSET,
RES_TEST_RAM0_SIZE, "Test System RAM 0", flags);
resource_test_insert_resource(test, parent, start + RES_TEST_WIN0_OFFSET,
RES_TEST_WIN0_SIZE, "Test CXL Window 0",
IORESOURCE_MEM);
resource_test_request_region(test, parent, start + RES_TEST_RAM1_OFFSET,
RES_TEST_RAM1_SIZE, "Test System RAM 1", flags);
resource_test_insert_resource(test, parent, start + RES_TEST_WIN1_OFFSET,
RES_TEST_WIN1_SIZE, "Test CXL Window 1",
IORESOURCE_MEM);
resource_test_request_region(test, parent, start + RES_TEST_RAM2_OFFSET,
RES_TEST_RAM2_SIZE, "Test System RAM 2", flags);
resource_test_insert_resource(test, parent, start + RES_TEST_CODE_OFFSET,
RES_TEST_CODE_SIZE, "Test Code", flags);
resource_test_request_region(test, parent, start + RES_TEST_RAM3_OFFSET,
RES_TEST_RAM3_SIZE, "Test System RAM 3", flags);
kunit_release_action(test, remove_free_resource, parent);
KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
region_intersects(start + RES_TEST_RAM0_OFFSET, PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
region_intersects(start + RES_TEST_RAM0_OFFSET +
RES_TEST_RAM0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_DISJOINT,
region_intersects(start + RES_TEST_HOLE0_OFFSET, PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_DISJOINT,
region_intersects(start + RES_TEST_HOLE0_OFFSET +
RES_TEST_HOLE0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_MIXED,
region_intersects(start + RES_TEST_WIN0_OFFSET +
RES_TEST_WIN0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
region_intersects(start + RES_TEST_RAM1_OFFSET +
RES_TEST_RAM1_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
region_intersects(start + RES_TEST_RAM2_OFFSET +
RES_TEST_RAM2_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
region_intersects(start + RES_TEST_CODE_OFFSET, PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
region_intersects(start + RES_TEST_RAM2_OFFSET,
RES_TEST_RAM2_SIZE + PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
KUNIT_EXPECT_EQ(test, REGION_MIXED,
region_intersects(start + RES_TEST_RAM3_OFFSET,
RES_TEST_RAM3_SIZE + PAGE_SIZE,
IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
}
static struct kunit_case resource_test_cases[] = {
KUNIT_CASE(resource_test_union),
KUNIT_CASE(resource_test_intersection),
KUNIT_CASE(resource_test_region_intersects),
{}
};
static struct kunit_suite resource_test_suite = {
.name = "resource",
.test_cases = resource_test_cases,
};
kunit_test_suite(resource_test_suite);
MODULE_DESCRIPTION("I/O Port & Memory Resource manager unit tests");
MODULE_LICENSE("GPL");
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