The patch titled Subject: kallsyms: fix build without execinfo has been added to the -mm mm-hotfixes-unstable branch. Its filename is kallsyms-fix-build-without-execinfo.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Achill Gilgenast fossdd@pwned.life Subject: kallsyms: fix build without execinfo Date: Sun, 22 Jun 2025 03:45:49 +0200

Some libc's like musl libc don't provide execinfo.h since it's not part of POSIX. In order to fix compilation on musl, only include execinfo.h if available (HAVE_BACKTRACE_SUPPORT)

This was discovered with c104c16073b7 ("Kunit to check the longest symbol length") which starts to include linux/kallsyms.h with Alpine Linux' configs.

Link: https://lkml.kernel.org/r/20250622014608.448718-1-fossdd@pwned.life Fixes: c104c16073b7 ("Kunit to check the longest symbol length") Signed-off-by: Achill Gilgenast fossdd@pwned.life Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

tools/include/linux/kallsyms.h | 4 ++++ 1 file changed, 4 insertions(+)

--- a/tools/include/linux/kallsyms.h~kallsyms-fix-build-without-execinfo +++ a/tools/include/linux/kallsyms.h @@ -18,6 +18,7 @@ static inline const char *kallsyms_looku return NULL; }

+#ifdef HAVE_BACKTRACE_SUPPORT #include <execinfo.h> #include <stdlib.h> static inline void print_ip_sym(const char *loglvl, unsigned long ip) @@ -30,5 +31,8 @@ static inline void print_ip_sym(const ch

free(name); } +#else +static inline void print_ip_sym(const char *loglvl, unsigned long ip) {} +#endif

#endif _

Patches currently in -mm which might be from fossdd@pwned.life are

kallsyms-fix-build-without-execinfo.patch