[PATCH 5.12 095/127] kcsan: Fix debugfs initcall return type

Greg Kroah-Hartman
2021-05-24T16:06:29Z

From: Arnd Bergmann <arnd@arndb.de>

commit 976aac5f882989e4f6c1b3a7224819bf0e801c6a upstream.

clang with CONFIG_LTO_CLANG points out that an initcall function should
return an 'int' due to the changes made to the initcall macros in commit
3578ad11f3fb ("init: lto: fix PREL32 relocations"):

kernel/kcsan/debugfs.c:274:15: error: returning 'void' from a function with incompatible result type 'int'
late_initcall(kcsan_debugfs_init);
~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
include/linux/init.h:292:46: note: expanded from macro 'late_initcall'
#define late_initcall(fn) __define_initcall(fn, 7)

Fixes: e36299efe7d7 ("kcsan, debugfs: Move debugfs file creation out of early init")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/kcsan/debugfs.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/kernel/kcsan/debugfs.c
+++ b/kernel/kcsan/debugfs.c
@@ -261,9 +261,10 @@ static const struct file_operations debu
.release = single_release
};

-static void __init kcsan_debugfs_init(void)
+static int __init kcsan_debugfs_init(void)
{
debugfs_create_file("kcsan", 0644, NULL, NULL, &debugfs_ops);
+ return 0;
}

late_initcall(kcsan_debugfs_init);