memblock tests: Split up reset_memblock function

All memblock data structure fields are reset in one function. In some
test cases, it's preferred to reset memory region arrays without
modifying other values like allocation direction flag.

Extract two functions from reset_memblock, so it's possible to reset
different parts of memblock:
  - reset_memblock_regions    - reset region arrays and their counters
  - reset_memblock_attributes - set other fields to their default values

Update checks in basic_api.c to use new definitions. Remove
reset_memblock call from memblock_initialization_check, so the true
initial values are tested.

Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/5cc1ba9a0ade922dbf4ba450165b81a9ed17d4a9.1646055639.git.karolinadrobnik@gmail.com

tools/testing/memblock/tests/basic_api.c

@@ -8,8 +8,6 @@
 
 static int memblock_initialization_check(void)
 {
-	reset_memblock();
-
 	assert(memblock.memory.regions);
 	assert(memblock.memory.cnt == 1);
 	assert(memblock.memory.max == EXPECTED_MEMBLOCK_REGIONS);
@@ -43,7 +41,7 @@ static int memblock_add_simple_check(void)
 		.size = SZ_4M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r.base, r.size);
 
 	assert(rgn->base == r.base);
@@ -72,7 +70,7 @@ static int memblock_add_node_simple_check(void)
 		.size = SZ_16M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add_node(r.base, r.size, 1, MEMBLOCK_HOTPLUG);
 
 	assert(rgn->base == r.base);
@@ -110,7 +108,7 @@ static int memblock_add_disjoint_check(void)
 		.size = SZ_8K
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_add(r2.base, r2.size);
 
@@ -151,7 +149,7 @@ static int memblock_add_overlap_top_check(void)
 
 	total_size = (r1.base - r2.base) + r1.size;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_add(r2.base, r2.size);
 
@@ -190,7 +188,7 @@ static int memblock_add_overlap_bottom_check(void)
 
 	total_size = (r2.base - r1.base) + r2.size;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_add(r2.base, r2.size);
 
@@ -225,7 +223,7 @@ static int memblock_add_within_check(void)
 		.size = SZ_1M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_add(r2.base, r2.size);
 
@@ -249,7 +247,7 @@ static int memblock_add_twice_check(void)
 		.size = SZ_2M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 
 	memblock_add(r.base, r.size);
 	memblock_add(r.base, r.size);
@@ -290,7 +288,7 @@ static int memblock_reserve_simple_check(void)
 		.size = SZ_128M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r.base, r.size);
 
 	assert(rgn->base == r.base);
@@ -321,7 +319,7 @@ static int memblock_reserve_disjoint_check(void)
 		.size = SZ_512M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_reserve(r2.base, r2.size);
 
@@ -364,7 +362,7 @@ static int memblock_reserve_overlap_top_check(void)
 
 	total_size = (r1.base - r2.base) + r1.size;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_reserve(r2.base, r2.size);
 
@@ -404,7 +402,7 @@ static int memblock_reserve_overlap_bottom_check(void)
 
 	total_size = (r2.base - r1.base) + r2.size;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_reserve(r2.base, r2.size);
 
@@ -440,7 +438,7 @@ static int memblock_reserve_within_check(void)
 		.size = SZ_64K
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_reserve(r2.base, r2.size);
 
@@ -465,7 +463,7 @@ static int memblock_reserve_twice_check(void)
 		.size = SZ_2M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 
 	memblock_reserve(r.base, r.size);
 	memblock_reserve(r.base, r.size);
@@ -511,7 +509,7 @@ static int memblock_remove_simple_check(void)
 		.size = SZ_4M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_add(r2.base, r2.size);
 	memblock_remove(r1.base, r1.size);
@@ -545,7 +543,7 @@ static int memblock_remove_absent_check(void)
 		.size = SZ_1G
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_remove(r2.base, r2.size);
 
@@ -585,7 +583,7 @@ static int memblock_remove_overlap_top_check(void)
 	r2_end = r2.base + r2.size;
 	total_size = r1_end - r2_end;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_remove(r2.base, r2.size);
 
@@ -623,7 +621,7 @@ static int memblock_remove_overlap_bottom_check(void)
 
 	total_size = r2.base - r1.base;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_remove(r2.base, r2.size);
 
@@ -665,7 +663,7 @@ static int memblock_remove_within_check(void)
 	r2_size = (r1.base + r1.size) - (r2.base + r2.size);
 	total_size = r1_size + r2_size;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_add(r1.base, r1.size);
 	memblock_remove(r2.base, r2.size);
 
@@ -715,7 +713,7 @@ static int memblock_free_simple_check(void)
 		.size = SZ_1M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_reserve(r2.base, r2.size);
 	memblock_free((void *)r1.base, r1.size);
@@ -749,7 +747,7 @@ static int memblock_free_absent_check(void)
 		.size = SZ_128M
 	};
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_free((void *)r2.base, r2.size);
 
@@ -787,7 +785,7 @@ static int memblock_free_overlap_top_check(void)
 
 	total_size = (r1.size + r1.base) - (r2.base + r2.size);
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_free((void *)r2.base, r2.size);
 
@@ -824,7 +822,7 @@ static int memblock_free_overlap_bottom_check(void)
 
 	total_size = r2.base - r1.base;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_free((void *)r2.base, r2.size);
 
@@ -867,7 +865,7 @@ static int memblock_free_within_check(void)
 	r2_size = (r1.base + r1.size) - (r2.base + r2.size);
 	total_size = r1_size + r2_size;
 
-	reset_memblock();
+	reset_memblock_regions();
 	memblock_reserve(r1.base, r1.size);
 	memblock_free((void *)r2.base, r2.size);
 

tools/testing/memblock/tests/common.c

@@ -5,23 +5,25 @@
 #define INIT_MEMBLOCK_REGIONS			128
 #define INIT_MEMBLOCK_RESERVED_REGIONS		INIT_MEMBLOCK_REGIONS
 
-void reset_memblock(void)
+void reset_memblock_regions(void)
 {
 	memset(memblock.memory.regions, 0,
 	       memblock.memory.cnt * sizeof(struct memblock_region));
-	memset(memblock.reserved.regions, 0,
-	       memblock.reserved.cnt * sizeof(struct memblock_region));
-
 	memblock.memory.cnt	= 1;
 	memblock.memory.max	= INIT_MEMBLOCK_REGIONS;
-	memblock.memory.name	= "memory";
 	memblock.memory.total_size = 0;
 
+	memset(memblock.reserved.regions, 0,
+	       memblock.reserved.cnt * sizeof(struct memblock_region));
 	memblock.reserved.cnt	= 1;
 	memblock.reserved.max	= INIT_MEMBLOCK_RESERVED_REGIONS;
-	memblock.reserved.name	= "reserved";
 	memblock.reserved.total_size = 0;
+}
 
+void reset_memblock_attributes(void)
+{
+	memblock.memory.name	= "memory";
+	memblock.reserved.name	= "reserved";
 	memblock.bottom_up	= false;
 	memblock.current_limit	= MEMBLOCK_ALLOC_ANYWHERE;
 }

tools/testing/memblock/tests/common.h

@@ -10,6 +10,7 @@ struct region {
 	phys_addr_t size;
 };
 
-void reset_memblock(void);
+void reset_memblock_regions(void);
+void reset_memblock_attributes(void);
 
 #endif