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https://github.com/torvalds/linux
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403f177304
Currently, the bitops test consists of two parts: one part is executed during module load, the second part during module unload. This is cumbersome for the user, as he has to perform two steps to execute all tests, and is different from most (all?) other tests. Merge the two parts, so both are executed during module load. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Link: http://lkml.kernel.org/r/20200706112900.7097-1-geert@linux-m68k.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2020 Intel Corporation
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/printk.h>
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/* a tiny module only meant to test
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*
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* set/clear_bit
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* get_count_order/long
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*/
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/* use an enum because thats the most common BITMAP usage */
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enum bitops_fun {
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BITOPS_4 = 4,
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BITOPS_7 = 7,
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BITOPS_11 = 11,
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BITOPS_31 = 31,
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BITOPS_88 = 88,
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BITOPS_LAST = 255,
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BITOPS_LENGTH = 256
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};
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static DECLARE_BITMAP(g_bitmap, BITOPS_LENGTH);
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static unsigned int order_comb[][2] = {
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{0x00000003, 2},
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{0x00000004, 2},
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{0x00001fff, 13},
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{0x00002000, 13},
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{0x50000000, 31},
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{0x80000000, 31},
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{0x80003000, 32},
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};
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#ifdef CONFIG_64BIT
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static unsigned long order_comb_long[][2] = {
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{0x0000000300000000, 34},
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{0x0000000400000000, 34},
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{0x00001fff00000000, 45},
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{0x0000200000000000, 45},
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{0x5000000000000000, 63},
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{0x8000000000000000, 63},
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{0x8000300000000000, 64},
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};
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#endif
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static int __init test_bitops_startup(void)
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{
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int i, bit_set;
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pr_info("Starting bitops test\n");
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set_bit(BITOPS_4, g_bitmap);
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set_bit(BITOPS_7, g_bitmap);
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set_bit(BITOPS_11, g_bitmap);
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set_bit(BITOPS_31, g_bitmap);
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set_bit(BITOPS_88, g_bitmap);
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for (i = 0; i < ARRAY_SIZE(order_comb); i++) {
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if (order_comb[i][1] != get_count_order(order_comb[i][0]))
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pr_warn("get_count_order wrong for %x\n",
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order_comb[i][0]);
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}
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for (i = 0; i < ARRAY_SIZE(order_comb); i++) {
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if (order_comb[i][1] != get_count_order_long(order_comb[i][0]))
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pr_warn("get_count_order_long wrong for %x\n",
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order_comb[i][0]);
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}
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#ifdef CONFIG_64BIT
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for (i = 0; i < ARRAY_SIZE(order_comb_long); i++) {
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if (order_comb_long[i][1] !=
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get_count_order_long(order_comb_long[i][0]))
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pr_warn("get_count_order_long wrong for %lx\n",
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order_comb_long[i][0]);
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}
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#endif
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barrier();
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clear_bit(BITOPS_4, g_bitmap);
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clear_bit(BITOPS_7, g_bitmap);
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clear_bit(BITOPS_11, g_bitmap);
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clear_bit(BITOPS_31, g_bitmap);
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clear_bit(BITOPS_88, g_bitmap);
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bit_set = find_first_bit(g_bitmap, BITOPS_LAST);
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if (bit_set != BITOPS_LAST)
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pr_err("ERROR: FOUND SET BIT %d\n", bit_set);
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pr_info("Completed bitops test\n");
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return 0;
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}
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static void __exit test_bitops_unstartup(void)
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{
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}
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module_init(test_bitops_startup);
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module_exit(test_bitops_unstartup);
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MODULE_AUTHOR("Jesse Brandeburg <jesse.brandeburg@intel.com>, Wei Yang <richard.weiyang@gmail.com>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Bit testing module");
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