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lib: add module support to atomic64 tests

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Allow to compile the atomic64 test code either to a loadable module, or
builtin into the kernel.

Link: http://lkml.kernel.org/r/1483470276-10517-3-git-send-email-geert@linux-m68k.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Geert Uytterhoeven 2017-02-24 15:00:55 -08:00 committed by Linus Torvalds
parent ba95b045e9
commit 55ded9551f
2 changed files with 11 additions and 4 deletions
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5
lib/Kconfig.debug
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@ -1790,9 +1790,10 @@ config PERCPU_TEST
If unsure, say N. If unsure, say N.
config ATOMIC64_SELFTEST config ATOMIC64_SELFTEST
bool "Perform an atomic64_t self-test at boot" tristate "Perform an atomic64_t self-test"
help help
Enable this option to test the atomic64_t functions at boot. Enable this option to test the atomic64_t functions at boot or
at module load time.
If unsure, say N. If unsure, say N.

10
lib/atomic64_test.c
View File

@ -15,6 +15,7 @@
#include <linux/bug.h> #include <linux/bug.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/atomic.h> #include <linux/atomic.h>
#include <linux/module.h>
#ifdef CONFIG_X86 #ifdef CONFIG_X86
#include <asm/cpufeature.h> /* for boot_cpu_has below */ #include <asm/cpufeature.h> /* for boot_cpu_has below */
@ -241,7 +242,7 @@ static __init void test_atomic64(void)
BUG_ON(v.counter != r); BUG_ON(v.counter != r);
} }
static __init int test_atomics(void) static __init int test_atomics_init(void)
{ {
test_atomic(); test_atomic();
test_atomic64(); test_atomic64();
@ -264,4 +265,9 @@ static __init int test_atomics(void)
return 0; return 0;
} }
core_initcall(test_atomics); static __exit void test_atomics_exit(void) {}
module_init(test_atomics_init);
module_exit(test_atomics_exit);
MODULE_LICENSE("GPL");