[PATCH] signal: use kill_pgrp not kill_pg in the sunos compatibility code

I am slowly moving to a model where all process killing is struct pid based
instead of pid_t based.  The sunos compatibility code is one of the last users
of the old pid_t based kill_pg in the kernel.  By being complete I allow for
the future removal of kill_pg from the kernel, which will ensure I don't miss
something.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/sparc/kernel/sys_sunos.c

@@ -859,14 +859,16 @@ asmlinkage int sunos_wait4(pid_t pid, unsigned int __user *stat_addr,
 	return ret;
 }
 
-extern int kill_pg(int, int, int);
 asmlinkage int sunos_killpg(int pgrp, int sig)
 {
 	int ret;
 
-	lock_kernel();
-	ret = kill_pg(pgrp, sig, 0);
-	unlock_kernel();
+	rcu_read_lock();
+	ret = -EINVAL;
+	if (pgrp > 0)
+		ret = kill_pgrp(find_pid(pgrp), sig, 0);
+	rcu_read_unlock();
+
 	return ret;
 }
 

arch/sparc64/kernel/sys_sunos32.c

@@ -824,10 +824,17 @@ asmlinkage int sunos_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, in
 	return ret;
 }
 
-extern int kill_pg(int, int, int);
 asmlinkage int sunos_killpg(int pgrp, int sig)
 {
-	return kill_pg(pgrp, sig, 0);
+	int ret;
+
+	rcu_read_lock();
+	ret = -EINVAL;
+	if (pgrp > 0)
+		ret = kill_pgrp(find_pid(pgrp), sig, 0);
+	rcu_read_unlock();
+
+	return ret;
 }
 
 asmlinkage int sunos_audit(void)