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92fc7cb8ae
test_sort.c performs array-based and linked list sort test. Code allows to compile either as a loadable modules or builtin into the kernel. Current code is not allow to unload the test_sort.ko module after successful completion. This patch adds support to unload the "test_sort.ko" module by adding module_exit support. Previous patch was implemented auto unload support by returning -EAGAIN from module_init() function on successful case, but this approach is not ideal. The auto-unload might seem like a nice optimization, but it encourages inconsistent behaviour. And behaviour that is different from all other normal modules. Link: http://lkml.kernel.org/r/1513967133-6843-1-git-send-email-pravin.shedge4linux@gmail.com Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com> Cc: Kostenzer Felix <fkostenzer@live.at> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
50 lines
829 B
C
50 lines
829 B
C
#include <linux/sort.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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/* a simple boot-time regression test */
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#define TEST_LEN 1000
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static int __init cmpint(const void *a, const void *b)
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{
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return *(int *)a - *(int *)b;
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}
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static int __init test_sort_init(void)
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{
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int *a, i, r = 1, err = -ENOMEM;
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a = kmalloc_array(TEST_LEN, sizeof(*a), GFP_KERNEL);
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if (!a)
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return err;
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for (i = 0; i < TEST_LEN; i++) {
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r = (r * 725861) % 6599;
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a[i] = r;
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}
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sort(a, TEST_LEN, sizeof(*a), cmpint, NULL);
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err = -EINVAL;
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for (i = 0; i < TEST_LEN-1; i++)
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if (a[i] > a[i+1]) {
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pr_err("test has failed\n");
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goto exit;
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}
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err = 0;
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pr_info("test passed\n");
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exit:
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kfree(a);
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return err;
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}
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static void __exit test_sort_exit(void)
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{
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}
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module_init(test_sort_init);
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module_exit(test_sort_exit);
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MODULE_LICENSE("GPL");
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