1 // SPDX-License-Identifier: GPL-2.0-only
24 	 * +ul_one/-ul_one below would replace with inc/dec instructions.  in percpu_test_init()
26 	volatile unsigned int ui_one = 1;  in percpu_test_init()
28 	unsigned long ul = 0;  in percpu_test_init()  local
34 	l += -1;  in percpu_test_init()
35 	__this_cpu_add(long_counter, -1);  in percpu_test_init()
36 	CHECK(l, long_counter, -1);  in percpu_test_init()
38 	l += 1;  in percpu_test_init()
39 	__this_cpu_add(long_counter, 1);  in percpu_test_init()
42 	ul = 0;  in percpu_test_init()
45 	ul += 1UL;  in percpu_test_init()
46 	__this_cpu_add(ulong_counter, 1UL);  in percpu_test_init()
47 	CHECK(ul, ulong_counter, 1);  in percpu_test_init()
49 	ul += -1UL;  in percpu_test_init()
50 	__this_cpu_add(ulong_counter, -1UL);  in percpu_test_init()
51 	CHECK(ul, ulong_counter, 0);  in percpu_test_init()
53 	ul += -(unsigned long)1;  in percpu_test_init()
54 	__this_cpu_add(ulong_counter, -(unsigned long)1);  in percpu_test_init()
55 	CHECK(ul, ulong_counter, -1);  in percpu_test_init()
57 	ul = 0;  in percpu_test_init()
60 	ul -= 1;  in percpu_test_init()
62 	CHECK(ul, ulong_counter, -1);  in percpu_test_init()
63 	CHECK(ul, ulong_counter, ULONG_MAX);  in percpu_test_init()
65 	l += -ui_one;  in percpu_test_init()
66 	__this_cpu_add(long_counter, -ui_one);  in percpu_test_init()
77 	l -= ui_one;  in percpu_test_init()
79 	CHECK(l, long_counter, -1);  in percpu_test_init()
86 	CHECK(l, long_counter, 1);  in percpu_test_init()
88 	l += -ui_one;  in percpu_test_init()
89 	__this_cpu_add(long_counter, -ui_one);  in percpu_test_init()
95 	l -= ui_one;  in percpu_test_init()
97 	CHECK(l, long_counter, -1);  in percpu_test_init()
100 	ul = 0;  in percpu_test_init()
103 	ul += ui_one;  in percpu_test_init()
105 	CHECK(ul, ulong_counter, 1);  in percpu_test_init()
107 	ul = 0;  in percpu_test_init()
110 	ul -= ui_one;  in percpu_test_init()
112 	CHECK(ul, ulong_counter, -1);  in percpu_test_init()
113 	CHECK(ul, ulong_counter, ULONG_MAX);  in percpu_test_init()
115 	ul = 3;  in percpu_test_init()
118 	ul = this_cpu_sub_return(ulong_counter, ui_one);  in percpu_test_init()
119 	CHECK(ul, ulong_counter, 2);  in percpu_test_init()
121 	ul = __this_cpu_sub_return(ulong_counter, ui_one);  in percpu_test_init()
122 	CHECK(ul, ulong_counter, 1);  in percpu_test_init()
127 	return -EAGAIN;  /* Fail will directly unload the module */  in percpu_test_init()