1 files changed, 6 insertions, 4 deletions

diff --git a/arch/sparc/kernel/sys_sunos.c b/arch/sparc/kernel/sys_sunos.c
index 0bf8c165fc92..da6606f0cffc 100644
--- a/arch/sparc/kernel/sys_sunos.c
+++ b/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;
 }