From: Yoshinori Sato <ysato@users.sourceforge.jp>
Date: Fri, 1 Jan 2016 11:39:07 +0000 (+0900)
Subject: rx: usp update fix
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=16fb83dd40501862666f7ae3f7a09629ef6b5f20;p=uclinux-h8%2Flinux.git

rx: usp update fix

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---

diff --git a/arch/rx/kernel/process.c b/arch/rx/kernel/process.c
index 905702edc68c..ab5dc6d22ebe 100644
--- a/arch/rx/kernel/process.c
+++ b/arch/rx/kernel/process.c
@@ -109,7 +109,8 @@ int copy_thread(unsigned long clone_flags,
 		*childregs = *current_pt_regs();
 		childregs->r[1] = 0;
 		p->thread.pc = (unsigned long)ret_from_fork;
-		childregs->usp  = usp;
+		if(usp)
+			childregs->usp  = usp;
 	}
 
 	p->thread.sp = (unsigned long)childregs;