1 // SPDX-License-Identifier: GPL-2.0-only
25 	 * +ul_one/-ul_one below would replace with inc/dec instructions.  in percpu_test_init()
27 	volatile unsigned int ui_one = 1;  in percpu_test_init()
29 	unsigned long ul = 0;  in percpu_test_init()  local
36 	l += -1;  in percpu_test_init()
37 	__this_cpu_add(long_counter, -1);  in percpu_test_init()
38 	CHECK(l, long_counter, -1);  in percpu_test_init()
40 	l += 1;  in percpu_test_init()
41 	__this_cpu_add(long_counter, 1);  in percpu_test_init()
44 	ul = 0;  in percpu_test_init()
47 	ul += 1UL;  in percpu_test_init()
48 	__this_cpu_add(ulong_counter, 1UL);  in percpu_test_init()
49 	CHECK(ul, ulong_counter, 1);  in percpu_test_init()
51 	ul += -1UL;  in percpu_test_init()
52 	__this_cpu_add(ulong_counter, -1UL);  in percpu_test_init()
53 	CHECK(ul, ulong_counter, 0);  in percpu_test_init()
55 	ul += -(unsigned long)1;  in percpu_test_init()
56 	__this_cpu_add(ulong_counter, -(unsigned long)1);  in percpu_test_init()
57 	CHECK(ul, ulong_counter, -1);  in percpu_test_init()
59 	ul = 0;  in percpu_test_init()
62 	ul -= 1;  in percpu_test_init()
64 	CHECK(ul, ulong_counter, -1);  in percpu_test_init()
65 	CHECK(ul, ulong_counter, ULONG_MAX);  in percpu_test_init()
67 	l += -ui_one;  in percpu_test_init()
68 	__this_cpu_add(long_counter, -ui_one);  in percpu_test_init()
79 	l -= ui_one;  in percpu_test_init()
81 	CHECK(l, long_counter, -1);  in percpu_test_init()
88 	CHECK(l, long_counter, 1);  in percpu_test_init()
90 	l += -ui_one;  in percpu_test_init()
91 	__this_cpu_add(long_counter, -ui_one);  in percpu_test_init()
97 	l -= ui_one;  in percpu_test_init()
99 	CHECK(l, long_counter, -1);  in percpu_test_init()
102 	ul = 0;  in percpu_test_init()
105 	ul += ui_one;  in percpu_test_init()
107 	CHECK(ul, ulong_counter, 1);  in percpu_test_init()
109 	ul = 0;  in percpu_test_init()
112 	ul -= ui_one;  in percpu_test_init()
114 	CHECK(ul, ulong_counter, -1);  in percpu_test_init()
115 	CHECK(ul, ulong_counter, ULONG_MAX);  in percpu_test_init()
117 	ul = ull = 0;  in percpu_test_init()
120 	ul = ull += UINT_MAX;  in percpu_test_init()
122 	CHECK(ul, ulong_counter, UINT_MAX);  in percpu_test_init()
124 	ul = 3;  in percpu_test_init()
127 	ul = this_cpu_sub_return(ulong_counter, ui_one);  in percpu_test_init()
128 	CHECK(ul, ulong_counter, 2);  in percpu_test_init()
130 	ul = __this_cpu_sub_return(ulong_counter, ui_one);  in percpu_test_init()
131 	CHECK(ul, ulong_counter, 1);  in percpu_test_init()
136 	return -EAGAIN;  /* Fail will directly unload the module */  in percpu_test_init()