linux-libc-headers: Fix invalid conversion in cn_proc.h

Backport 'connector: Fix invalid conversion in cn_proc.h' commit to fix
error:
/
|/usr/include/linux/cn_proc.h: In function 'proc_cn_event
| valid_event(proc_cn_event)':
|/usr/include/linux/cn_proc.h:72:17: error: invalid conversion from
| 'unsigned int' to 'proc_cn_event' [-fpermissive]
|   72 |         ev_type &= PROC_EVENT_ALL;
|      |                 ^
|      |                 |
|      |                 unsigned int
\

Change is already merged in kernel branch linux-6.6.y [1].

1 - https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.6.y&id=06e785aeb9ea8a43d0a3967c1ba6e69d758e82d4

(From OE-Core rev: f023779af6c0e5c838bdacbd6d9765d1c6740575)

Signed-off-by: Fabio Berton <fbberton@gmail.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 41 insertions, 0 deletions

diff --git a/meta/recipes-kernel/linux-libc-headers/linux-libc-headers/0001-connector-Fix-invalid-conversion-in-cn_proc.h.patch b/meta/recipes-kernel/linux-libc-headers/linux-libc-headers/0001-connector-Fix-invalid-conversion-in-cn_proc.h.patch
new file mode 100644
index 0000000000..e245d97de0
--- /dev/null
+++ b/meta/recipes-kernel/linux-libc-headers/linux-libc-headers/0001-connector-Fix-invalid-conversion-in-cn_proc.h.patch
@@ -0,0 +1,40 @@
+From 06e785aeb9ea8a43d0a3967c1ba6e69d758e82d4 Mon Sep 17 00:00:00 2001
+From: Matt Jan <zoo868e@gmail.com>
+Date: Tue, 14 May 2024 12:10:46 +0800
+Subject: [PATCH] connector: Fix invalid conversion in cn_proc.h
+
+The implicit conversion from unsigned int to enum
+proc_cn_event is invalid, so explicitly cast it
+for compilation in a C++ compiler.
+/usr/include/linux/cn_proc.h: In function 'proc_cn_event valid_event(proc_cn_event)':
+/usr/include/linux/cn_proc.h:72:17: error: invalid conversion from 'unsigned int' to 'proc_cn_event' [-fpermissive]
+   72 |         ev_type &= PROC_EVENT_ALL;
+      |                 ^
+      |                 |
+      |                 unsigned int
+
+Signed-off-by: Matt Jan <zoo868e@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9258d795978f398ecf2d222a8388cff81d37d34d]
+---
+ include/uapi/linux/cn_proc.h | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/include/uapi/linux/cn_proc.h b/include/uapi/linux/cn_proc.h
+index f2afb7cc4926..18e3745b86cd 100644
+--- a/include/uapi/linux/cn_proc.h
++++ b/include/uapi/linux/cn_proc.h
+@@ -69,8 +69,7 @@ struct proc_input {
+ 
+ static inline enum proc_cn_event valid_event(enum proc_cn_event ev_type)
+ {
+-       ev_type &= PROC_EVENT_ALL;
+-       return ev_type;
++       return (enum proc_cn_event)(ev_type & PROC_EVENT_ALL);
+ }
+ 
+ /*
+-- 
+2.50.1
+
diff --git a/meta/recipes-kernel/linux-libc-headers/linux-libc-headers_6.6.bb b/meta/recipes-kernel/linux-libc-headers/linux-libc-headers_6.6.bb
index d68de6ec7e..11e7524fed 100644
--- a/meta/recipes-kernel/linux-libc-headers/linux-libc-headers_6.6.bb
+++ b/meta/recipes-kernel/linux-libc-headers/linux-libc-headers_6.6.bb
@@ -8,6 +8,7 @@ SRC_URI:append:libc-musl = "\
 
 SRC_URI += "\
     file://0001-kbuild-install_headers.sh-Strip-_UAPI-from-if-define.patch \
+    file://0001-connector-Fix-invalid-conversion-in-cn_proc.h.patch \
 "
 
 LIC_FILES_CHKSUM = "file://COPYING;md5=6bc538ed5bd9a7fc9398086aedcd7e46"