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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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c58bbd39f8
ARM has support for the atomic64_dec_if_positive operation so ensure that it is tested by the atomic64_test routine. Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
167 lines
3.5 KiB
C
167 lines
3.5 KiB
C
/*
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* Testsuite for atomic64_t functions
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*
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* Copyright © 2010 Luca Barbieri
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <asm/atomic.h>
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#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
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static __init int test_atomic64(void)
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{
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long long v0 = 0xaaa31337c001d00dLL;
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long long v1 = 0xdeadbeefdeafcafeLL;
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long long v2 = 0xfaceabadf00df001LL;
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long long onestwos = 0x1111111122222222LL;
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long long one = 1LL;
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atomic64_t v = ATOMIC64_INIT(v0);
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long long r = v0;
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BUG_ON(v.counter != r);
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atomic64_set(&v, v1);
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r = v1;
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BUG_ON(v.counter != r);
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BUG_ON(atomic64_read(&v) != r);
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INIT(v0);
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atomic64_add(onestwos, &v);
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r += onestwos;
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BUG_ON(v.counter != r);
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INIT(v0);
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atomic64_add(-one, &v);
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r += -one;
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BUG_ON(v.counter != r);
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INIT(v0);
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r += onestwos;
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BUG_ON(atomic64_add_return(onestwos, &v) != r);
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BUG_ON(v.counter != r);
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INIT(v0);
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r += -one;
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BUG_ON(atomic64_add_return(-one, &v) != r);
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BUG_ON(v.counter != r);
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INIT(v0);
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atomic64_sub(onestwos, &v);
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r -= onestwos;
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BUG_ON(v.counter != r);
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INIT(v0);
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atomic64_sub(-one, &v);
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r -= -one;
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BUG_ON(v.counter != r);
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INIT(v0);
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r -= onestwos;
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BUG_ON(atomic64_sub_return(onestwos, &v) != r);
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BUG_ON(v.counter != r);
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INIT(v0);
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r -= -one;
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BUG_ON(atomic64_sub_return(-one, &v) != r);
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BUG_ON(v.counter != r);
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INIT(v0);
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atomic64_inc(&v);
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r += one;
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BUG_ON(v.counter != r);
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INIT(v0);
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r += one;
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BUG_ON(atomic64_inc_return(&v) != r);
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BUG_ON(v.counter != r);
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INIT(v0);
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atomic64_dec(&v);
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r -= one;
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BUG_ON(v.counter != r);
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INIT(v0);
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r -= one;
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BUG_ON(atomic64_dec_return(&v) != r);
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BUG_ON(v.counter != r);
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INIT(v0);
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BUG_ON(atomic64_xchg(&v, v1) != v0);
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r = v1;
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BUG_ON(v.counter != r);
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INIT(v0);
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BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
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r = v1;
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BUG_ON(v.counter != r);
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INIT(v0);
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BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
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BUG_ON(v.counter != r);
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INIT(v0);
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BUG_ON(atomic64_add_unless(&v, one, v0));
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BUG_ON(v.counter != r);
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INIT(v0);
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BUG_ON(!atomic64_add_unless(&v, one, v1));
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r += one;
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BUG_ON(v.counter != r);
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#if defined(CONFIG_X86) || defined(CONFIG_MIPS) || defined(CONFIG_PPC) || \
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defined(CONFIG_S390) || defined(_ASM_GENERIC_ATOMIC64_H) || defined(CONFIG_ARM)
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INIT(onestwos);
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BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
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r -= one;
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BUG_ON(v.counter != r);
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INIT(0);
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BUG_ON(atomic64_dec_if_positive(&v) != -one);
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BUG_ON(v.counter != r);
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INIT(-one);
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BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
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BUG_ON(v.counter != r);
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#else
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#warning Please implement atomic64_dec_if_positive for your architecture, and add it to the IF above
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#endif
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INIT(onestwos);
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BUG_ON(!atomic64_inc_not_zero(&v));
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r += one;
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BUG_ON(v.counter != r);
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INIT(0);
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BUG_ON(atomic64_inc_not_zero(&v));
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BUG_ON(v.counter != r);
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INIT(-one);
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BUG_ON(!atomic64_inc_not_zero(&v));
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r += one;
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BUG_ON(v.counter != r);
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#ifdef CONFIG_X86
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printk(KERN_INFO "atomic64 test passed for %s platform %s CX8 and %s SSE\n",
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#ifdef CONFIG_X86_64
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"x86-64",
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#elif defined(CONFIG_X86_CMPXCHG64)
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"i586+",
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#else
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"i386+",
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#endif
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boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
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boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
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#else
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printk(KERN_INFO "atomic64 test passed\n");
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#endif
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return 0;
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}
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core_initcall(test_atomic64);
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