diff options
| -rw-r--r-- | lib/Kconfig.debug | 8 | ||||
| -rw-r--r-- | lib/Makefile | 1 | ||||
| -rw-r--r-- | lib/sort.c | 41 | ||||
| -rw-r--r-- | lib/test_sort.c | 43 |
4 files changed, 54 insertions, 39 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 213decb76922..55735c9bdb75 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1739,6 +1739,14 @@ config TEST_LIST_SORT If unsure, say N. +config TEST_SORT + bool "Array-based sort test" + depends on DEBUG_KERNEL + help + This option enables the self-test function of 'sort()' at boot. + + If unsure, say N. + config KPROBES_SANITY_TEST bool "Kprobes sanity tests" depends on DEBUG_KERNEL diff --git a/lib/Makefile b/lib/Makefile index d6d53b70f58d..445a39c21f46 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_TEST_KASAN) += test_kasan.o obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o obj-$(CONFIG_TEST_LKM) += test_module.o obj-$(CONFIG_TEST_RHASHTABLE) += test_rhashtable.o +obj-$(CONFIG_TEST_SORT) += test_sort.o obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_keys.o obj-$(CONFIG_TEST_STATIC_KEYS) += test_static_key_base.o diff --git a/lib/sort.c b/lib/sort.c index fc20df42aa6f..975c6ef6fec7 100644 --- a/lib/sort.c +++ b/lib/sort.c @@ -4,6 +4,8 @@ * Jan 23 2005 Matt Mackall <mpm@selenic.com> */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <linux/types.h> #include <linux/export.h> #include <linux/sort.h> @@ -101,42 +103,3 @@ void sort(void *base, size_t num, size_t size, } EXPORT_SYMBOL(sort); - -#if 0 -#include <linux/slab.h> -/* a simple boot-time regression test */ - -int cmpint(const void *a, const void *b) -{ - return *(int *)a - *(int *)b; -} - -static int sort_test(void) -{ - int *a, i, r = 1; - - a = kmalloc(1000 * sizeof(int), GFP_KERNEL); - BUG_ON(!a); - - printk("testing sort()\n"); - - for (i = 0; i < 1000; i++) { - r = (r * 725861) % 6599; - a[i] = r; - } - - sort(a, 1000, sizeof(int), cmpint, NULL); - - for (i = 0; i < 999; i++) - if (a[i] > a[i+1]) { - printk("sort() failed!\n"); - break; - } - - kfree(a); - - return 0; -} - -module_init(sort_test); -#endif diff --git a/lib/test_sort.c b/lib/test_sort.c new file mode 100644 index 000000000000..d389c1cc2f6c --- /dev/null +++ b/lib/test_sort.c @@ -0,0 +1,43 @@ +#include <linux/sort.h> +#include <linux/slab.h> +#include <linux/module.h> + +/* a simple boot-time regression test */ + +#define TEST_LEN 1000 + +static int __init cmpint(const void *a, const void *b) +{ + return *(int *)a - *(int *)b; +} + +static int __init test_sort_init(void) +{ + int *a, i, r = 1, err = -ENOMEM; + + a = kmalloc_array(TEST_LEN, sizeof(*a), GFP_KERNEL); + if (!a) + return err; + + for (i = 0; i < TEST_LEN; i++) { + r = (r * 725861) % 6599; + a[i] = r; + } + + sort(a, TEST_LEN, sizeof(*a), cmpint, NULL); + + err = -EINVAL; + for (i = 0; i < TEST_LEN-1; i++) + if (a[i] > a[i+1]) { + pr_err("test has failed\n"); + goto exit; + } + err = 0; + pr_info("test passed\n"); +exit: + kfree(a); + return err; +} + +module_init(test_sort_init); +MODULE_LICENSE("GPL"); |