When I cat module parameter 'capabilities' by sysfs, it displays as follows. It's better to add a newline for easy reading.
root@syzkaller:~# cat /sys/module/ocfs2_dlmfs/parameters/capabilities bast stackglueroot@syzkaller:~# Signed-off-by: Xiongfeng Wang <wangxiongfe...@huawei.com> --- fs/ocfs2/dlmfs/dlmfs.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index ea868c6f9800..1f9c864ec09b 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -82,8 +82,13 @@ static int param_set_dlmfs_capabilities(const char *val, static int param_get_dlmfs_capabilities(char *buffer, const struct kernel_param *kp) { - return strlcpy(buffer, DLMFS_CAPABILITIES, + int cnt; + + cnt = strlcpy(buffer, DLMFS_CAPABILITIES, strlen(DLMFS_CAPABILITIES) + 1); + cnt += sprintf(buffer + cnt, "\n"); + + return cnt; } module_param_call(capabilities, param_set_dlmfs_capabilities, param_get_dlmfs_capabilities, NULL, 0444); -- 2.20.1