From d22c3e0088e85be8131f7a9283f759cdbb20726d Mon Sep 17 00:00:00 2001 From: Sven Schnelle Date: Wed, 9 Sep 2026 11:29:53 +0200 Subject: selftests/ftrace: Fix unique symbol check in kprobe_non_uniq_symbol.tc The current regex also matches symbols in modules, which makes the test fail on s390 where name_show is present only once in the kernel, but also multiple times in modules: 000001b1401cdc20 t name_show 000001b0c05e6c40 t name_show [mdev] 000001b0c0495f30 t name_show [i2c_core] Fix this by changing the regular expression to only match the function name. Link: https://lore.kernel.org/all/20260909092954.2200558-1-svens@linux.ibm.com/ Fixes: 03b80ff8023a ("selftests/ftrace: Add new test case which checks non unique symbol") Signed-off-by: Sven Schnelle Reviewed-by: Steven Rostedt Signed-off-by: Masami Hiramatsu (Google) --- lib/crc/gen_crc64table.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 lib/crc/gen_crc64table.c (limited to 'lib/crc/gen_crc64table.c') diff --git a/lib/crc/gen_crc64table.c b/lib/crc/gen_crc64table.c new file mode 100644 index 000000000..f2be9f62b --- /dev/null +++ b/lib/crc/gen_crc64table.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * This host program runs at kernel build time and generates the lookup tables + * used by the generic CRC64 code. + * + * Copyright 2018 SUSE Linux. + * Author: Coly Li + */ +#include +#include + +#define CRC64_ECMA182_POLY 0x42F0E1EBA9EA3693ULL +#define CRC64_NVME_POLY 0x9A6C9329AC4BC9B5ULL + +static uint64_t crc64_table[256] = {0}; +static uint64_t crc64_nvme_table[256] = {0}; + +static void generate_reflected_crc64_table(uint64_t table[256], uint64_t poly) +{ + uint64_t i, j, c, crc; + + for (i = 0; i < 256; i++) { + crc = 0ULL; + c = i; + + for (j = 0; j < 8; j++) { + if ((crc ^ (c >> j)) & 1) + crc = (crc >> 1) ^ poly; + else + crc >>= 1; + } + table[i] = crc; + } +} + +static void generate_crc64_table(uint64_t table[256], uint64_t poly) +{ + uint64_t i, j, c, crc; + + for (i = 0; i < 256; i++) { + crc = 0; + c = i << 56; + + for (j = 0; j < 8; j++) { + if ((crc ^ c) & 0x8000000000000000ULL) + crc = (crc << 1) ^ poly; + else + crc <<= 1; + c <<= 1; + } + + table[i] = crc; + } +} + +static void output_table(uint64_t table[256]) +{ + int i; + + for (i = 0; i < 256; i++) { + printf("\t0x%016" PRIx64 "ULL", table[i]); + if (i & 0x1) + printf(",\n"); + else + printf(", "); + } + printf("};\n"); +} + +static void print_crc64_tables(void) +{ + printf("/* this file is generated - do not edit */\n\n"); + printf("#include \n"); + printf("#include \n\n"); + printf("static const u64 ____cacheline_aligned crc64table[256] = {\n"); + output_table(crc64_table); + + printf("\nstatic const u64 ____cacheline_aligned crc64nvmetable[256] = {\n"); + output_table(crc64_nvme_table); +} + +int main(int argc, char *argv[]) +{ + generate_crc64_table(crc64_table, CRC64_ECMA182_POLY); + generate_reflected_crc64_table(crc64_nvme_table, CRC64_NVME_POLY); + print_crc64_tables(); + return 0; +} -- cgit v1.3.1