switch rt_tgsigqueueinfo to COMPAT_SYSCALL_DEFINE

C ABI violations on sparc, ppc and mips
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

include/linux/signal.h

@@ -241,8 +241,6 @@ extern int do_send_sig_info(int sig, struct siginfo *info,
 				struct task_struct *p, bool group);
 extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p);
 extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *);
-extern long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig,
-				 siginfo_t *info);
 extern int do_sigtimedwait(const sigset_t *, siginfo_t *,
 				const struct timespec *);
 extern int sigprocmask(int, sigset_t *, sigset_t *);

kernel/compat.c

@@ -1025,17 +1025,6 @@ COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese,
 	return ret;
 }
 
-asmlinkage long
-compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
-			     struct compat_siginfo __user *uinfo)
-{
-	siginfo_t info;
-
-	if (copy_siginfo_from_user32(&info, uinfo))
-		return -EFAULT;
-	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
-}
-
 #ifdef __ARCH_WANT_COMPAT_SYS_TIME
 
 /* compat_time_t is a 32 bit "long" and needs to get converted. */

kernel/signal.c

@@ -3030,7 +3030,7 @@ COMPAT_SYSCALL_DEFINE3(rt_sigqueueinfo,
 #endif
 #endif
 
-long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info)
+static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info)
 {
 	/* This is only valid for single tasks */
 	if (pid <= 0 || tgid <= 0)
@@ -3060,6 +3060,21 @@ SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig,
 	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
 }
 
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(rt_tgsigqueueinfo,
+			compat_pid_t, tgid,
+			compat_pid_t, pid,
+			int, sig,
+			struct compat_siginfo __user *, uinfo)
+{
+	siginfo_t info;
+
+	if (copy_siginfo_from_user32(&info, uinfo))
+		return -EFAULT;
+	return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
+}
+#endif
+
 int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
 {
 	struct task_struct *t = current;