On Fri, Oct 07, 2005 at 11:51:52PM +0900, Atsushi Nemoto wrote: > The setup_sigcontect/restore_sigcontext might sleep on > put_user/get_user with preemption disabled (i.e. atomic context). > Sleeping in atomic context is not allowed. This patch fixes this > problem using temporary variable (struct sigcontext tmpsc). > > Another possible fix might be rewriting > restore_fp_context/save_fp_context to copy to/from current > thread_struct and use them with restore_fp/save_fp. I think much of the 87d54649f67d8ffe0a8d8176de8c210a6c4bb4a7 preemption patch is flawed and the problem you were trying to fix are in part just caused by it. Rule of thumb - if there's a preempt_disable anywhere, it's probably wrong ... Ralf
