Messages in this thread | | | Date | Mon, 4 Aug 2014 17:34:59 +0200 | From | Oleg Nesterov <> | Subject | Re: [PATCH 4/5] x86: entry_64.S: always allocate complete "struct pt_regs" |
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On 08/04, Oleg Nesterov wrote: > > On 08/04, Denys Vlasenko wrote: > > > > "why do we need percpu old_rsp thingy?" in particular. > > See thread_struct->usersp, current_user_stack_pointer().
Btw, perhaps it makes sense to document that task_pt_regs(current)->sp is not current_user_stack_pointer() inside system_call_fastpath.
Oleg.
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