On Mon, Sep 27, 2021 at 02:42:51PM +0800, Huacai Chen wrote: > This patch adds signal handling support for LoongArch. No matter what you get in regs[4] after sys_rt_sigreturn(), you should *NOT* treat it as restartable. IOW, you need to set regs[0] to 0 in there (or in restore_sigcontext()). See e.g. 653d48b22166 for details of similar bug on arm.