lkml.org 
[lkml]   [2013]   [Jan]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 19/19] [INCOMPLETE] ARM: make return_address available for ARM_UNWIND
On Fri, Jan 25, 2013 at 12:08:23PM -0500, Steven Rostedt wrote:
> On Fri, 2013-01-25 at 16:59 +0000, Dave Martin wrote:
>
> > Cool. Are you aware of return_address being used elsewhere? Currently
> > I'm not aware of anything else which uses it, and grep is not finding
> > any calls outside ftrace.h that I can see.
>
> softirq.c has a trace_preempt_off() use of CALLER_ADDR1.
>
> kernel/sched/core.c has CALLER_ADDR1, 2 an 3.

These cases look safe to me ... sched/core.c:get_parent_ip() looks like
it uses notrace purely to avoid the spurious extra frame which it would
otherwise insert, and the code in softirq.c doesn't appear to be in a
notrace context.

Am I being too optimistic, or does that match your understanding?

Cheers
---Dave


\
 
 \ /
  Last update: 2013-01-25 19:01    [W:0.405 / U:15.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site