lttng-modules: fix build failure on genericarm64

Workaround to unblock genericarm64 builds.
Upstream is working on a better fix
https://bugs.lttng.org/issues/1426

Fixes: https://bugzilla.yoctoproject.org/show_bug.cgi?id=15840

(From OE-Core rev: c57a903b9ac6d3015195a59829c223917e9c41f8)

Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 36 insertions, 0 deletions

diff --git a/meta/recipes-kernel/lttng/lttng-modules/0001-lttng-modules-fix-sigaction-build-without-CONFIG_COM.patch b/meta/recipes-kernel/lttng/lttng-modules/0001-lttng-modules-fix-sigaction-build-without-CONFIG_COM.patch
new file mode 100644
index 0000000000..eb43abbae2
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0001-lttng-modules-fix-sigaction-build-without-CONFIG_COM.patch
@@ -0,0 +1,35 @@
+From 0e2095bcc50e7a07d3478f8d3c0ae5ad46575594 Mon Sep 17 00:00:00 2001
+From: Mikko Rapeli <mikko.rapeli@linaro.org>
+Date: Mon, 28 Apr 2025 12:07:24 +0000
+Subject: [PATCH] lttng-modules: fix sigaction build without
+ CONFIG_COMPAT_OLD_SIGACTION
+
+Workaround build failure when CONFIG_COMPAT_OLD_SIGACTION is not enabled
+in kernel config.
+
+Upstream-Status: Submitted [https://bugs.lttng.org/issues/1426]
+
+Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org>
+---
+ .../instrumentation/syscalls/headers/arm-32-syscalls_pointers.h | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/include/instrumentation/syscalls/headers/arm-32-syscalls_pointers.h b/include/instrumentation/syscalls/headers/arm-32-syscalls_pointers.h
+index 5f4ca5b..1514cae 100644
+--- a/include/instrumentation/syscalls/headers/arm-32-syscalls_pointers.h
++++ b/include/instrumentation/syscalls/headers/arm-32-syscalls_pointers.h
+@@ -1890,9 +1890,11 @@ TRACE_SYSCALL_TABLE(chroot, chroot, 61, 1)
+ #ifndef OVERRIDE_TABLE_32_ustat
+ TRACE_SYSCALL_TABLE(ustat, ustat, 62, 2)
+ #endif
++#ifdef CONFIG_COMPAT_OLD_SIGACTION
+ #ifndef OVERRIDE_TABLE_32_sigaction
+ TRACE_SYSCALL_TABLE(sigaction, sigaction, 67, 3)
+ #endif
++#endif /* CONFIG_COMPAT_OLD_SIGACTION */
+ #ifndef OVERRIDE_TABLE_32_sigpending
+ TRACE_SYSCALL_TABLE(sigpending, sigpending, 73, 1)
+ #endif
+-- 
+2.49.0
+
diff --git a/meta/recipes-kernel/lttng/lttng-modules_2.13.18.bb b/meta/recipes-kernel/lttng/lttng-modules_2.13.18.bb
index 553dae9f4d..1b2327f609 100644
--- a/meta/recipes-kernel/lttng/lttng-modules_2.13.18.bb
+++ b/meta/recipes-kernel/lttng/lttng-modules_2.13.18.bb
@@ -10,6 +10,7 @@ inherit module
 include lttng-platforms.inc
 
 SRC_URI = "https://lttng.org/files/${BPN}/${BPN}-${PV}.tar.bz2 \
+           file://0001-lttng-modules-fix-sigaction-build-without-CONFIG_COM.patch \
            "
 
 # Use :append here so that the patch is applied also when using devupstream