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In some drivers we want to have a single operation over bitmap which is an equivalent to: *dst = (*old & ~(*mask)) | (*new & *mask) Introduce bitmap_replace() helper for this. Link: http://lkml.kernel.org/r/20191022172922.61232-8-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Cc: William Breathitt Gray <vilhelm.gray@gmail.com> Cc: Yury Norov <yury.norov@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
527 lines
14 KiB
C
527 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Test cases for bitmap API.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/bitmap.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/printk.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/uaccess.h>
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#include "../tools/testing/selftests/kselftest_module.h"
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static unsigned total_tests __initdata;
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static unsigned failed_tests __initdata;
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static char pbl_buffer[PAGE_SIZE] __initdata;
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static const unsigned long exp1[] __initconst = {
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BITMAP_FROM_U64(1),
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BITMAP_FROM_U64(2),
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BITMAP_FROM_U64(0x0000ffff),
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BITMAP_FROM_U64(0xffff0000),
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BITMAP_FROM_U64(0x55555555),
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BITMAP_FROM_U64(0xaaaaaaaa),
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BITMAP_FROM_U64(0x11111111),
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BITMAP_FROM_U64(0x22222222),
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BITMAP_FROM_U64(0xffffffff),
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BITMAP_FROM_U64(0xfffffffe),
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BITMAP_FROM_U64(0x3333333311111111ULL),
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BITMAP_FROM_U64(0xffffffff77777777ULL),
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BITMAP_FROM_U64(0),
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};
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static const unsigned long exp2[] __initconst = {
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BITMAP_FROM_U64(0x3333333311111111ULL),
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BITMAP_FROM_U64(0xffffffff77777777ULL),
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};
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/* Fibonacci sequence */
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static const unsigned long exp2_to_exp3_mask[] __initconst = {
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BITMAP_FROM_U64(0x008000020020212eULL),
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};
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/* exp3_0_1 = (exp2[0] & ~exp2_to_exp3_mask) | (exp2[1] & exp2_to_exp3_mask) */
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static const unsigned long exp3_0_1[] __initconst = {
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BITMAP_FROM_U64(0x33b3333311313137ULL),
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};
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/* exp3_1_0 = (exp2[1] & ~exp2_to_exp3_mask) | (exp2[0] & exp2_to_exp3_mask) */
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static const unsigned long exp3_1_0[] __initconst = {
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BITMAP_FROM_U64(0xff7fffff77575751ULL),
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};
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static bool __init
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__check_eq_uint(const char *srcfile, unsigned int line,
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const unsigned int exp_uint, unsigned int x)
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{
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if (exp_uint != x) {
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pr_err("[%s:%u] expected %u, got %u\n",
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srcfile, line, exp_uint, x);
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return false;
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}
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return true;
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}
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static bool __init
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__check_eq_bitmap(const char *srcfile, unsigned int line,
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const unsigned long *exp_bmap, const unsigned long *bmap,
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unsigned int nbits)
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{
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if (!bitmap_equal(exp_bmap, bmap, nbits)) {
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pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
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srcfile, line,
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nbits, exp_bmap, nbits, bmap);
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return false;
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}
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return true;
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}
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static bool __init
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__check_eq_pbl(const char *srcfile, unsigned int line,
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const char *expected_pbl,
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const unsigned long *bitmap, unsigned int nbits)
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{
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snprintf(pbl_buffer, sizeof(pbl_buffer), "%*pbl", nbits, bitmap);
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if (strcmp(expected_pbl, pbl_buffer)) {
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pr_warn("[%s:%u] expected \"%s\", got \"%s\"\n",
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srcfile, line,
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expected_pbl, pbl_buffer);
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return false;
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}
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return true;
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}
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static bool __init
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__check_eq_u32_array(const char *srcfile, unsigned int line,
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const u32 *exp_arr, unsigned int exp_len,
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const u32 *arr, unsigned int len) __used;
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static bool __init
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__check_eq_u32_array(const char *srcfile, unsigned int line,
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const u32 *exp_arr, unsigned int exp_len,
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const u32 *arr, unsigned int len)
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{
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if (exp_len != len) {
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pr_warn("[%s:%u] array length differ: expected %u, got %u\n",
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srcfile, line,
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exp_len, len);
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return false;
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}
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if (memcmp(exp_arr, arr, len*sizeof(*arr))) {
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pr_warn("[%s:%u] array contents differ\n", srcfile, line);
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print_hex_dump(KERN_WARNING, " exp: ", DUMP_PREFIX_OFFSET,
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32, 4, exp_arr, exp_len*sizeof(*exp_arr), false);
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print_hex_dump(KERN_WARNING, " got: ", DUMP_PREFIX_OFFSET,
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32, 4, arr, len*sizeof(*arr), false);
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return false;
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}
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return true;
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}
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static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
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const unsigned int offset,
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const unsigned int size,
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const unsigned char *const clump_exp,
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const unsigned long *const clump)
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{
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unsigned long exp;
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if (offset >= size) {
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pr_warn("[%s:%u] bit offset for clump out-of-bounds: expected less than %u, got %u\n",
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srcfile, line, size, offset);
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return false;
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}
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exp = clump_exp[offset / 8];
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if (!exp) {
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pr_warn("[%s:%u] bit offset for zero clump: expected nonzero clump, got bit offset %u with clump value 0",
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srcfile, line, offset);
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return false;
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}
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if (*clump != exp) {
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pr_warn("[%s:%u] expected clump value of 0x%lX, got clump value of 0x%lX",
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srcfile, line, exp, *clump);
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return false;
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}
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return true;
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}
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#define __expect_eq(suffix, ...) \
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({ \
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int result = 0; \
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total_tests++; \
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if (!__check_eq_ ## suffix(__FILE__, __LINE__, \
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##__VA_ARGS__)) { \
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failed_tests++; \
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result = 1; \
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} \
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result; \
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})
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#define expect_eq_uint(...) __expect_eq(uint, ##__VA_ARGS__)
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#define expect_eq_bitmap(...) __expect_eq(bitmap, ##__VA_ARGS__)
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#define expect_eq_pbl(...) __expect_eq(pbl, ##__VA_ARGS__)
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#define expect_eq_u32_array(...) __expect_eq(u32_array, ##__VA_ARGS__)
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#define expect_eq_clump8(...) __expect_eq(clump8, ##__VA_ARGS__)
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static void __init test_zero_clear(void)
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{
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DECLARE_BITMAP(bmap, 1024);
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/* Known way to set all bits */
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memset(bmap, 0xff, 128);
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expect_eq_pbl("0-22", bmap, 23);
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expect_eq_pbl("0-1023", bmap, 1024);
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/* single-word bitmaps */
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bitmap_clear(bmap, 0, 9);
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expect_eq_pbl("9-1023", bmap, 1024);
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bitmap_zero(bmap, 35);
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expect_eq_pbl("64-1023", bmap, 1024);
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/* cross boundaries operations */
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bitmap_clear(bmap, 79, 19);
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expect_eq_pbl("64-78,98-1023", bmap, 1024);
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bitmap_zero(bmap, 115);
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expect_eq_pbl("128-1023", bmap, 1024);
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/* Zeroing entire area */
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bitmap_zero(bmap, 1024);
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expect_eq_pbl("", bmap, 1024);
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}
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static void __init test_fill_set(void)
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{
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DECLARE_BITMAP(bmap, 1024);
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/* Known way to clear all bits */
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memset(bmap, 0x00, 128);
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expect_eq_pbl("", bmap, 23);
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expect_eq_pbl("", bmap, 1024);
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/* single-word bitmaps */
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bitmap_set(bmap, 0, 9);
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expect_eq_pbl("0-8", bmap, 1024);
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bitmap_fill(bmap, 35);
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expect_eq_pbl("0-63", bmap, 1024);
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/* cross boundaries operations */
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bitmap_set(bmap, 79, 19);
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expect_eq_pbl("0-63,79-97", bmap, 1024);
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bitmap_fill(bmap, 115);
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expect_eq_pbl("0-127", bmap, 1024);
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/* Zeroing entire area */
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bitmap_fill(bmap, 1024);
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expect_eq_pbl("0-1023", bmap, 1024);
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}
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static void __init test_copy(void)
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{
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DECLARE_BITMAP(bmap1, 1024);
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DECLARE_BITMAP(bmap2, 1024);
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bitmap_zero(bmap1, 1024);
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bitmap_zero(bmap2, 1024);
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/* single-word bitmaps */
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bitmap_set(bmap1, 0, 19);
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bitmap_copy(bmap2, bmap1, 23);
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expect_eq_pbl("0-18", bmap2, 1024);
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bitmap_set(bmap2, 0, 23);
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bitmap_copy(bmap2, bmap1, 23);
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expect_eq_pbl("0-18", bmap2, 1024);
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/* multi-word bitmaps */
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bitmap_set(bmap1, 0, 109);
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bitmap_copy(bmap2, bmap1, 1024);
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expect_eq_pbl("0-108", bmap2, 1024);
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bitmap_fill(bmap2, 1024);
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bitmap_copy(bmap2, bmap1, 1024);
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expect_eq_pbl("0-108", bmap2, 1024);
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/* the following tests assume a 32- or 64-bit arch (even 128b
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* if we care)
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*/
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bitmap_fill(bmap2, 1024);
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bitmap_copy(bmap2, bmap1, 109); /* ... but 0-padded til word length */
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expect_eq_pbl("0-108,128-1023", bmap2, 1024);
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bitmap_fill(bmap2, 1024);
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bitmap_copy(bmap2, bmap1, 97); /* ... but aligned on word length */
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expect_eq_pbl("0-108,128-1023", bmap2, 1024);
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}
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#define EXP2_IN_BITS (sizeof(exp2) * 8)
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static void __init test_replace(void)
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{
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unsigned int nbits = 64;
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DECLARE_BITMAP(bmap, 1024);
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bitmap_zero(bmap, 1024);
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bitmap_replace(bmap, &exp2[0], &exp2[1], exp2_to_exp3_mask, nbits);
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expect_eq_bitmap(bmap, exp3_0_1, nbits);
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bitmap_zero(bmap, 1024);
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bitmap_replace(bmap, &exp2[1], &exp2[0], exp2_to_exp3_mask, nbits);
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expect_eq_bitmap(bmap, exp3_1_0, nbits);
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bitmap_fill(bmap, 1024);
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bitmap_replace(bmap, &exp2[0], &exp2[1], exp2_to_exp3_mask, nbits);
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expect_eq_bitmap(bmap, exp3_0_1, nbits);
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bitmap_fill(bmap, 1024);
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bitmap_replace(bmap, &exp2[1], &exp2[0], exp2_to_exp3_mask, nbits);
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expect_eq_bitmap(bmap, exp3_1_0, nbits);
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}
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#define PARSE_TIME 0x1
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struct test_bitmap_parselist{
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const int errno;
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const char *in;
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const unsigned long *expected;
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const int nbits;
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const int flags;
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};
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static const struct test_bitmap_parselist parselist_tests[] __initconst = {
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#define step (sizeof(u64) / sizeof(unsigned long))
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{0, "0", &exp1[0], 8, 0},
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{0, "1", &exp1[1 * step], 8, 0},
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{0, "0-15", &exp1[2 * step], 32, 0},
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{0, "16-31", &exp1[3 * step], 32, 0},
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{0, "0-31:1/2", &exp1[4 * step], 32, 0},
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{0, "1-31:1/2", &exp1[5 * step], 32, 0},
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{0, "0-31:1/4", &exp1[6 * step], 32, 0},
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{0, "1-31:1/4", &exp1[7 * step], 32, 0},
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{0, "0-31:4/4", &exp1[8 * step], 32, 0},
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{0, "1-31:4/4", &exp1[9 * step], 32, 0},
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{0, "0-31:1/4,32-63:2/4", &exp1[10 * step], 64, 0},
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{0, "0-31:3/4,32-63:4/4", &exp1[11 * step], 64, 0},
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{0, " ,, 0-31:3/4 ,, 32-63:4/4 ,, ", &exp1[11 * step], 64, 0},
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{0, "0-31:1/4,32-63:2/4,64-95:3/4,96-127:4/4", exp2, 128, 0},
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{0, "0-2047:128/256", NULL, 2048, PARSE_TIME},
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{0, "", &exp1[12 * step], 8, 0},
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{0, "\n", &exp1[12 * step], 8, 0},
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{0, ",, ,, , , ,", &exp1[12 * step], 8, 0},
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{0, " , ,, , , ", &exp1[12 * step], 8, 0},
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{0, " , ,, , , \n", &exp1[12 * step], 8, 0},
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{-EINVAL, "-1", NULL, 8, 0},
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{-EINVAL, "-0", NULL, 8, 0},
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{-EINVAL, "10-1", NULL, 8, 0},
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{-EINVAL, "0-31:", NULL, 8, 0},
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{-EINVAL, "0-31:0", NULL, 8, 0},
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{-EINVAL, "0-31:0/", NULL, 8, 0},
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{-EINVAL, "0-31:0/0", NULL, 8, 0},
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{-EINVAL, "0-31:1/0", NULL, 8, 0},
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{-EINVAL, "0-31:10/1", NULL, 8, 0},
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{-EOVERFLOW, "0-98765432123456789:10/1", NULL, 8, 0},
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{-EINVAL, "a-31", NULL, 8, 0},
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{-EINVAL, "0-a1", NULL, 8, 0},
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{-EINVAL, "a-31:10/1", NULL, 8, 0},
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{-EINVAL, "0-31:a/1", NULL, 8, 0},
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{-EINVAL, "0-\n", NULL, 8, 0},
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#undef step
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};
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static void __init __test_bitmap_parselist(int is_user)
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{
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int i;
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int err;
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ktime_t time;
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DECLARE_BITMAP(bmap, 2048);
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char *mode = is_user ? "_user" : "";
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for (i = 0; i < ARRAY_SIZE(parselist_tests); i++) {
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#define ptest parselist_tests[i]
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if (is_user) {
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mm_segment_t orig_fs = get_fs();
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size_t len = strlen(ptest.in);
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set_fs(KERNEL_DS);
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time = ktime_get();
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err = bitmap_parselist_user((__force const char __user *)ptest.in, len,
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bmap, ptest.nbits);
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time = ktime_get() - time;
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set_fs(orig_fs);
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} else {
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time = ktime_get();
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err = bitmap_parselist(ptest.in, bmap, ptest.nbits);
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time = ktime_get() - time;
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}
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if (err != ptest.errno) {
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pr_err("parselist%s: %d: input is %s, errno is %d, expected %d\n",
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mode, i, ptest.in, err, ptest.errno);
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continue;
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}
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if (!err && ptest.expected
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&& !__bitmap_equal(bmap, ptest.expected, ptest.nbits)) {
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pr_err("parselist%s: %d: input is %s, result is 0x%lx, expected 0x%lx\n",
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mode, i, ptest.in, bmap[0],
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*ptest.expected);
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continue;
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}
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if (ptest.flags & PARSE_TIME)
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pr_err("parselist%s: %d: input is '%s' OK, Time: %llu\n",
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mode, i, ptest.in, time);
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#undef ptest
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}
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}
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static void __init test_bitmap_parselist(void)
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{
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__test_bitmap_parselist(0);
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}
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static void __init test_bitmap_parselist_user(void)
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{
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__test_bitmap_parselist(1);
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}
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#define EXP1_IN_BITS (sizeof(exp1) * 8)
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static void __init test_bitmap_arr32(void)
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{
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unsigned int nbits, next_bit;
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u32 arr[EXP1_IN_BITS / 32];
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DECLARE_BITMAP(bmap2, EXP1_IN_BITS);
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memset(arr, 0xa5, sizeof(arr));
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for (nbits = 0; nbits < EXP1_IN_BITS; ++nbits) {
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bitmap_to_arr32(arr, exp1, nbits);
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bitmap_from_arr32(bmap2, arr, nbits);
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expect_eq_bitmap(bmap2, exp1, nbits);
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next_bit = find_next_bit(bmap2,
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round_up(nbits, BITS_PER_LONG), nbits);
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if (next_bit < round_up(nbits, BITS_PER_LONG))
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pr_err("bitmap_copy_arr32(nbits == %d:"
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" tail is not safely cleared: %d\n",
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nbits, next_bit);
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if (nbits < EXP1_IN_BITS - 32)
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expect_eq_uint(arr[DIV_ROUND_UP(nbits, 32)],
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0xa5a5a5a5);
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}
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}
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static void noinline __init test_mem_optimisations(void)
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{
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DECLARE_BITMAP(bmap1, 1024);
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DECLARE_BITMAP(bmap2, 1024);
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unsigned int start, nbits;
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|
|
|
for (start = 0; start < 1024; start += 8) {
|
|
for (nbits = 0; nbits < 1024 - start; nbits += 8) {
|
|
memset(bmap1, 0x5a, sizeof(bmap1));
|
|
memset(bmap2, 0x5a, sizeof(bmap2));
|
|
|
|
bitmap_set(bmap1, start, nbits);
|
|
__bitmap_set(bmap2, start, nbits);
|
|
if (!bitmap_equal(bmap1, bmap2, 1024)) {
|
|
printk("set not equal %d %d\n", start, nbits);
|
|
failed_tests++;
|
|
}
|
|
if (!__bitmap_equal(bmap1, bmap2, 1024)) {
|
|
printk("set not __equal %d %d\n", start, nbits);
|
|
failed_tests++;
|
|
}
|
|
|
|
bitmap_clear(bmap1, start, nbits);
|
|
__bitmap_clear(bmap2, start, nbits);
|
|
if (!bitmap_equal(bmap1, bmap2, 1024)) {
|
|
printk("clear not equal %d %d\n", start, nbits);
|
|
failed_tests++;
|
|
}
|
|
if (!__bitmap_equal(bmap1, bmap2, 1024)) {
|
|
printk("clear not __equal %d %d\n", start,
|
|
nbits);
|
|
failed_tests++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static const unsigned char clump_exp[] __initconst = {
|
|
0x01, /* 1 bit set */
|
|
0x02, /* non-edge 1 bit set */
|
|
0x00, /* zero bits set */
|
|
0x38, /* 3 bits set across 4-bit boundary */
|
|
0x38, /* Repeated clump */
|
|
0x0F, /* 4 bits set */
|
|
0xFF, /* all bits set */
|
|
0x05, /* non-adjacent 2 bits set */
|
|
};
|
|
|
|
static void __init test_for_each_set_clump8(void)
|
|
{
|
|
#define CLUMP_EXP_NUMBITS 64
|
|
DECLARE_BITMAP(bits, CLUMP_EXP_NUMBITS);
|
|
unsigned int start;
|
|
unsigned long clump;
|
|
|
|
/* set bitmap to test case */
|
|
bitmap_zero(bits, CLUMP_EXP_NUMBITS);
|
|
bitmap_set(bits, 0, 1); /* 0x01 */
|
|
bitmap_set(bits, 9, 1); /* 0x02 */
|
|
bitmap_set(bits, 27, 3); /* 0x28 */
|
|
bitmap_set(bits, 35, 3); /* 0x28 */
|
|
bitmap_set(bits, 40, 4); /* 0x0F */
|
|
bitmap_set(bits, 48, 8); /* 0xFF */
|
|
bitmap_set(bits, 56, 1); /* 0x05 - part 1 */
|
|
bitmap_set(bits, 58, 1); /* 0x05 - part 2 */
|
|
|
|
for_each_set_clump8(start, clump, bits, CLUMP_EXP_NUMBITS)
|
|
expect_eq_clump8(start, CLUMP_EXP_NUMBITS, clump_exp, &clump);
|
|
}
|
|
|
|
static void __init selftest(void)
|
|
{
|
|
test_zero_clear();
|
|
test_fill_set();
|
|
test_copy();
|
|
test_replace();
|
|
test_bitmap_arr32();
|
|
test_bitmap_parselist();
|
|
test_bitmap_parselist_user();
|
|
test_mem_optimisations();
|
|
test_for_each_set_clump8();
|
|
}
|
|
|
|
KSTM_MODULE_LOADERS(test_bitmap);
|
|
MODULE_AUTHOR("david decotigny <david.decotigny@googlers.com>");
|
|
MODULE_LICENSE("GPL");
|