[PATCH] apparmor: use SEND_SIG_NOINFO instead of NULL in aa_audit()

[Oleg Nesterov <oleg@redhat.com>]

SEND_SIG_NOINFO is defined as ((struct kernel_siginfo *) 0), so passing
NULL works, but:

- this works "by accident" and looks as if the caller doesn't understand
  the signal sending API.

- more importantly, this hides the usage of SEND_SIG_NOINFO from grep,
  and this is really bad.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 security/apparmor/audit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/apparmor/audit.c b/security/apparmor/audit.c
index 4a60b6fda75f..15e42e96b163 100644
--- a/security/apparmor/audit.c
+++ b/security/apparmor/audit.c
@@ -192,7 +192,7 @@ int aa_audit(int type, struct aa_profile *profile,
 	aa_audit_msg(type, ad, cb);
 
 	if (ad->type == AUDIT_APPARMOR_KILL)
-		(void)send_sig_info(profile->signal, NULL,
+		send_sig_info(profile->signal, SEND_SIG_NOINFO,
 			ad->common.type == LSM_AUDIT_DATA_TASK &&
 			ad->common.u.tsk ? ad->common.u.tsk : current);
 
-- 
2.52.0