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Release 4.17 lib/atomic64_test.c

Directory: lib
/*
 * Testsuite for atomic64_t functions
 *
 * Copyright © 2010  Luca Barbieri
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/atomic.h>
#include <linux/module.h>

#ifdef CONFIG_X86
#include <asm/cpufeature.h>	/* for boot_cpu_has below */
#endif


#define TEST(bit, op, c_op, val)				\
do {                                                            \
        atomic##bit##_set(&v, v0);                              \
        r = v0;                                                 \
        atomic##bit##_##op(val, &v);                            \
        r c_op val;                                             \
        WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n",       \
                (unsigned long long)atomic##bit##_read(&v),     \
                (unsigned long long)r);                         \
} while (0)

/*
 * Test for a atomic operation family,
 * @test should be a macro accepting parameters (bit, op, ...)
 */


#define FAMILY_TEST(test, bit, op, args...)	\
do {                                            \
        test(bit, op, ##args);          \
        test(bit, op##_acquire, ##args);        \
        test(bit, op##_release, ##args);        \
        test(bit, op##_relaxed, ##args);        \
} while (0)


#define TEST_RETURN(bit, op, c_op, val)				\
do {                                                            \
        atomic##bit##_set(&v, v0);                              \
        r = v0;                                                 \
        r c_op val;                                             \
        BUG_ON(atomic##bit##_##op(val, &v) != r);               \
        BUG_ON(atomic##bit##_read(&v) != r);                    \
} while (0)


#define TEST_FETCH(bit, op, c_op, val)				\
do {                                                            \
        atomic##bit##_set(&v, v0);                              \
        r = v0;                                                 \
        r c_op val;                                             \
        BUG_ON(atomic##bit##_##op(val, &v) != v0);              \
        BUG_ON(atomic##bit##_read(&v) != r);                    \
} while (0)


#define RETURN_FAMILY_TEST(bit, op, c_op, val)			\
do {                                                            \
        FAMILY_TEST(TEST_RETURN, bit, op, c_op, val);           \
} while (0)


#define FETCH_FAMILY_TEST(bit, op, c_op, val)			\
do {                                                            \
        FAMILY_TEST(TEST_FETCH, bit, op, c_op, val);            \
} while (0)


#define TEST_ARGS(bit, op, init, ret, expect, args...)		\
do {                                                            \
        atomic##bit##_set(&v, init);                            \
        BUG_ON(atomic##bit##_##op(&v, ##args) != ret);          \
        BUG_ON(atomic##bit##_read(&v) != expect);               \
} while (0)


#define XCHG_FAMILY_TEST(bit, init, new)				\
do {                                                                    \
        FAMILY_TEST(TEST_ARGS, bit, xchg, init, init, new, new);        \
} while (0)


#define CMPXCHG_FAMILY_TEST(bit, init, new, wrong)			\
do {                                                                    \
        FAMILY_TEST(TEST_ARGS, bit, cmpxchg,                            \
                        init, init, new, init, new);                    \
        FAMILY_TEST(TEST_ARGS, bit, cmpxchg,                            \
                        init, init, init, wrong, new);                  \
} while (0)


#define INC_RETURN_FAMILY_TEST(bit, i)			\
do {                                                    \
        FAMILY_TEST(TEST_ARGS, bit, inc_return,         \
                        i, (i) + one, (i) + one);       \
} while (0)


#define DEC_RETURN_FAMILY_TEST(bit, i)			\
do {                                                    \
        FAMILY_TEST(TEST_ARGS, bit, dec_return,         \
                        i, (i) - one, (i) - one);       \
} while (0)


static __init void test_atomic(void) { int v0 = 0xaaa31337; int v1 = 0xdeadbeef; int onestwos = 0x11112222; int one = 1; atomic_t v; int r; TEST(, add, +=, onestwos); TEST(, add, +=, -one); TEST(, sub, -=, onestwos); TEST(, sub, -=, -one); TEST(, or, |=, v1); TEST(, and, &=, v1); TEST(, xor, ^=, v1); TEST(, andnot, &= ~, v1); RETURN_FAMILY_TEST(, add_return, +=, onestwos); RETURN_FAMILY_TEST(, add_return, +=, -one); RETURN_FAMILY_TEST(, sub_return, -=, onestwos); RETURN_FAMILY_TEST(, sub_return, -=, -one); FETCH_FAMILY_TEST(, fetch_add, +=, onestwos); FETCH_FAMILY_TEST(, fetch_add, +=, -one); FETCH_FAMILY_TEST(, fetch_sub, -=, onestwos); FETCH_FAMILY_TEST(, fetch_sub, -=, -one); FETCH_FAMILY_TEST(, fetch_or, |=, v1); FETCH_FAMILY_TEST(, fetch_and, &=, v1); FETCH_FAMILY_TEST(, fetch_andnot, &= ~, v1); FETCH_FAMILY_TEST(, fetch_xor, ^=, v1); INC_RETURN_FAMILY_TEST(, v0); DEC_RETURN_FAMILY_TEST(, v0); XCHG_FAMILY_TEST(, v0, v1); CMPXCHG_FAMILY_TEST(, v0, v1, onestwos); }

Contributors

PersonTokensPropCommitsCommitProp
Peter Zijlstra18574.30%266.67%
Boqun Feng6425.70%133.33%
Total249100.00%3100.00%

#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
static __init void test_atomic64(void) { long long v0 = 0xaaa31337c001d00dLL; long long v1 = 0xdeadbeefdeafcafeLL; long long v2 = 0xfaceabadf00df001LL; long long v3 = 0x8000000000000000LL; long long onestwos = 0x1111111122222222LL; long long one = 1LL; int r_int; atomic64_t v = ATOMIC64_INIT(v0); long long r = v0; BUG_ON(v.counter != r); atomic64_set(&v, v1); r = v1; BUG_ON(v.counter != r); BUG_ON(atomic64_read(&v) != r); TEST(64, add, +=, onestwos); TEST(64, add, +=, -one); TEST(64, sub, -=, onestwos); TEST(64, sub, -=, -one); TEST(64, or, |=, v1); TEST(64, and, &=, v1); TEST(64, xor, ^=, v1); TEST(64, andnot, &= ~, v1); RETURN_FAMILY_TEST(64, add_return, +=, onestwos); RETURN_FAMILY_TEST(64, add_return, +=, -one); RETURN_FAMILY_TEST(64, sub_return, -=, onestwos); RETURN_FAMILY_TEST(64, sub_return, -=, -one); FETCH_FAMILY_TEST(64, fetch_add, +=, onestwos); FETCH_FAMILY_TEST(64, fetch_add, +=, -one); FETCH_FAMILY_TEST(64, fetch_sub, -=, onestwos); FETCH_FAMILY_TEST(64, fetch_sub, -=, -one); FETCH_FAMILY_TEST(64, fetch_or, |=, v1); FETCH_FAMILY_TEST(64, fetch_and, &=, v1); FETCH_FAMILY_TEST(64, fetch_andnot, &= ~, v1); FETCH_FAMILY_TEST(64, fetch_xor, ^=, v1); INIT(v0); atomic64_inc(&v); r += one; BUG_ON(v.counter != r); INIT(v0); atomic64_dec(&v); r -= one; BUG_ON(v.counter != r); INC_RETURN_FAMILY_TEST(64, v0); DEC_RETURN_FAMILY_TEST(64, v0); XCHG_FAMILY_TEST(64, v0, v1); CMPXCHG_FAMILY_TEST(64, v0, v1, v2); INIT(v0); BUG_ON(atomic64_add_unless(&v, one, v0)); BUG_ON(v.counter != r); INIT(v0); BUG_ON(!atomic64_add_unless(&v, one, v1)); r += one; BUG_ON(v.counter != r); INIT(onestwos); BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1)); r -= one; BUG_ON(v.counter != r); INIT(0); BUG_ON(atomic64_dec_if_positive(&v) != -one); BUG_ON(v.counter != r); INIT(-one); BUG_ON(atomic64_dec_if_positive(&v) != (-one - one)); BUG_ON(v.counter != r); INIT(onestwos); BUG_ON(!atomic64_inc_not_zero(&v)); r += one; BUG_ON(v.counter != r); INIT(0); BUG_ON(atomic64_inc_not_zero(&v)); BUG_ON(v.counter != r); INIT(-one); BUG_ON(!atomic64_inc_not_zero(&v)); r += one; BUG_ON(v.counter != r); /* Confirm the return value fits in an int, even if the value doesn't */ INIT(v3); r_int = atomic64_inc_not_zero(&v); BUG_ON(!r_int); }

Contributors

PersonTokensPropCommitsCommitProp
Luca Barbieri43766.01%342.86%
Peter Zijlstra16124.32%228.57%
Boqun Feng355.29%114.29%
Michael Ellerman294.38%114.29%
Total662100.00%7100.00%


static __init int test_atomics_init(void) { test_atomic(); test_atomic64(); #ifdef CONFIG_X86 pr_info("passed for %s platform %s CX8 and %s SSE\n", #ifdef CONFIG_X86_64 "x86-64", #elif defined(CONFIG_X86_CMPXCHG64) "i586+", #else "i386+", #endif boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without", boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without"); #else pr_info("passed\n"); #endif return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Luca Barbieri4461.11%120.00%
Peter Zijlstra1318.06%120.00%
H. Peter Anvin1013.89%120.00%
Fabian Frederick45.56%120.00%
Geert Uytterhoeven11.39%120.00%
Total72100.00%5100.00%


static __exit void test_atomics_exit(void) {}

Contributors

PersonTokensPropCommitsCommitProp
Geert Uytterhoeven8100.00%1100.00%
Total8100.00%1100.00%

module_init(test_atomics_init); module_exit(test_atomics_exit); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Luca Barbieri49741.56%320.00%
Peter Zijlstra40133.53%213.33%
Boqun Feng20817.39%16.67%
Michael Ellerman292.42%16.67%
Geert Uytterhoeven242.01%16.67%
Fabian Frederick110.92%16.67%
H. Peter Anvin100.84%16.67%
Andi Kleen80.67%16.67%
Paul Gortmaker30.25%16.67%
Peter Hüwe30.25%16.67%
Borislav Petkov10.08%16.67%
Arun Sharma10.08%16.67%
Total1196100.00%15100.00%
Directory: lib
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