[ Upstream commit 9c0e343d7654a329d1f9b53d253cbf7fb6eff85d ] We should get psr value from regs->psr in stack, not directly get it from phyiscal register then save the vector number in tsk->trap_no. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Signed-off-by: Sasha Levin <sashal@kernel.org>