Re: [PATCH] percpu: make this_cpu_generic_read notrace

2016-09-24 Thread Arnd Bergmann
On Friday, September 16, 2016 10:53:09 AM CEST Will Deacon wrote: > On Fri, Sep 16, 2016 at 04:42:44PM +0800, Chunyan Zhang wrote: > > Hi Will and Steven, > > > > May I have a review or an acked-by from you on this patch so that Arnd > > can pick it up. > > > > I have tested this patch on arm qem

Re: [PATCH] percpu: make this_cpu_generic_read notrace

2016-09-16 Thread Steven Rostedt
On Fri, 16 Sep 2016 10:53:09 +0100 Will Deacon wrote: > On Fri, Sep 16, 2016 at 04:42:44PM +0800, Chunyan Zhang wrote: > > Hi Will and Steven, > > > > May I have a review or an acked-by from you on this patch so that Arnd > > can pick it up. > > > > I have tested this patch on arm qemu, I'm sur

Re: [PATCH] percpu: make this_cpu_generic_read notrace

2016-09-16 Thread Chunyan Zhang
On 16 September 2016 at 17:53, Will Deacon wrote: > On Fri, Sep 16, 2016 at 04:42:44PM +0800, Chunyan Zhang wrote: >> Hi Will and Steven, >> >> May I have a review or an acked-by from you on this patch so that Arnd >> can pick it up. >> >> I have tested this patch on arm qemu, I'm sure it can solv

Re: [PATCH] percpu: make this_cpu_generic_read notrace

2016-09-16 Thread Will Deacon
On Fri, Sep 16, 2016 at 04:42:44PM +0800, Chunyan Zhang wrote: > Hi Will and Steven, > > May I have a review or an acked-by from you on this patch so that Arnd > can pick it up. > > I have tested this patch on arm qemu, I'm sure it can solve the > problem described in commit message. It looks fi

Re: [PATCH] percpu: make this_cpu_generic_read notrace

2016-09-16 Thread Chunyan Zhang
Hi Will and Steven, May I have a review or an acked-by from you on this patch so that Arnd can pick it up. I have tested this patch on arm qemu, I'm sure it can solve the problem described in commit message. Thanks, Chunyan On 10 September 2016 at 16:45, Chunyan Zhang wrote: > When debug pre

[PATCH] percpu: make this_cpu_generic_read notrace

2016-09-10 Thread Chunyan Zhang
When debug preempt or preempt tracer is enabled, preempt_count_add/sub() can be traced by function and function graph tracing, and preempt_disable/enable() would call preempt_count_add/sub(), so we should use preempt_disable/enable_notrace in Ftrace subsystem. The function this_cpu_read() started