From a27fe3712090a67ef4275a82ea0c60d8fdd50c61 Mon Sep 17 00:00:00 2001
From: ligd <liguiding1@xiaomi.com>
Date: Wed, 20 Jan 2021 22:03:59 +0800
Subject: [PATCH] signal/sig_kill.c: remove the limitation of kill(0, xx)

since there are situation which send singal to idle thread already,

CONFIG_SCHED_CHILD_STATUS=y
CONFIG_SCHED_HAVE_PARENT=y

Signo SIGCHLD will send to parent group, when child exit

Change-Id: Iceb2ac41948c1c3418839a3b5de70985d48c75d1
Signed-off-by: ligd <liguiding1@xiaomi.com>
---
 sched/signal/sig_kill.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sched/signal/sig_kill.c b/sched/signal/sig_kill.c
index e8399b6c631..66dce9ea0d2 100644
--- a/sched/signal/sig_kill.c
+++ b/sched/signal/sig_kill.c
@@ -81,7 +81,7 @@ int nxsig_kill(pid_t pid, int signo)
 
   /* We do not support sending signals to process groups */
 
-  if (pid <= 0)
+  if (pid < 0)
     {
       return -ENOSYS;
     }