mips: take the "zero newsp means inherit the parent's one" to copy_thread()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-12-27 11:52:32 -05:00
parent 974fdb3c20
commit 64b3122df4
3 changed files with 3 additions and 6 deletions
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -156,7 +156,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 	*childregs = *regs;
 	childregs->regs[7] = 0;	/* Clear error flag */
 	childregs->regs[2] = 0;	/* Child gets zero as return value */
-	childregs->regs[29] = usp;
+	if (usp)
+		childregs->regs[29] = usp;
 	ti->addr_limit = USER_DS;

 	p->thread.reg29 = (unsigned long) childregs;