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/clz_ctz.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 lib/clz_ctz.c (limited to 'lib/clz_ctz.c') diff --git a/lib/clz_ctz.c b/lib/clz_ctz.c new file mode 100644 index 000000000..8778ec44b --- /dev/null +++ b/lib/clz_ctz.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * lib/clz_ctz.c + * + * Copyright (C) 2013 Chanho Min + * + * The functions in this file aren't called directly, but are required by + * GCC builtins such as __builtin_ctz, and therefore they can't be removed + * despite appearing unreferenced in kernel source. + * + * __c[lt]z[sd]i2 can be overridden by linking arch-specific versions. + */ + +#include +#include + +int __weak __ctzsi2(int val); +int __weak __attribute_const__ __ctzsi2(int val) +{ + return __ffs(val); +} +EXPORT_SYMBOL(__ctzsi2); + +int __weak __clzsi2(int val); +int __weak __attribute_const__ __clzsi2(int val) +{ + return 32 - fls(val); +} +EXPORT_SYMBOL(__clzsi2); + +int __weak __clzdi2(u64 val); +int __weak __attribute_const__ __clzdi2(u64 val) +{ + return 64 - fls64(val); +} +EXPORT_SYMBOL(__clzdi2); + +int __weak __ctzdi2(u64 val); +int __weak __attribute_const__ __ctzdi2(u64 val) +{ + return __ffs64(val); +} +EXPORT_SYMBOL(__ctzdi2); -- cgit v1.3.1