cregit-Linux how code gets into the kernel

Release 4.7 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>

#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 RETURN_FAMILY_TEST(bit, op, c_op, val)			\
do {                                                            \
        FAMILY_TEST(TEST_RETURN, 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); INC_RETURN_FAMILY_TEST(, v0); DEC_RETURN_FAMILY_TEST(, v0); XCHG_FAMILY_TEST(, v0, v1); CMPXCHG_FAMILY_TEST(, v0, v1, onestwos); }

Contributors

PersonTokensPropCommitsCommitProp
peter zijlstrapeter zijlstra11063.22%150.00%
boqun fengboqun feng6436.78%150.00%
Total174100.00%2100.00%

#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 onestwos = 0x1111111122222222LL; long long one = 1LL; 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); 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); #ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 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); #else #warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol #endif 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); }

Contributors

PersonTokensPropCommitsCommitProp
luca barbieriluca barbieri44380.25%457.14%
peter zijlstrapeter zijlstra7012.68%114.29%
boqun fengboqun feng356.34%114.29%
catalin marinascatalin marinas40.72%114.29%
Total552100.00%7100.00%


static __init int test_atomics(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 barbieriluca barbieri4461.11%125.00%
peter zijlstrapeter zijlstra1419.44%125.00%
h. peter anvinh. peter anvin1013.89%125.00%
fabian frederickfabian frederick45.56%125.00%
Total72100.00%4100.00%

core_initcall(test_atomics);

Overall Contributors

PersonTokensPropCommitsCommitProp
luca barbieriluca barbieri50452.39%428.57%
peter zijlstrapeter zijlstra20921.73%17.14%
boqun fengboqun feng20821.62%17.14%
fabian frederickfabian frederick111.14%17.14%
h. peter anvinh. peter anvin101.04%17.14%
andi kleenandi kleen80.83%17.14%
catalin marinascatalin marinas40.42%17.14%
peter huewepeter huewe30.31%17.14%
paul gortmakerpaul gortmaker30.31%17.14%
arun sharmaarun sharma10.10%17.14%
borislav petkovborislav petkov10.10%17.14%
Total962100.00%14100.00%
Directory: lib
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