linux-kernel - RE: linux-next: build warnings after merge of the char-misc tree

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Date:	Mon, 13 Apr 2015 10:44:20 +0000
From:	"Winkler, Tomas" <tomas.winkler@...el.com>
To:	Greg KH <greg@...ah.com>, Stephen Rothwell <sfr@...b.auug.org.au>
CC:	Arnd Bergmann <arnd@...db.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: linux-next: build warnings after merge of the char-misc tree



> -----Original Message-----
> From: Greg KH [mailto:greg@...ah.com]
> Sent: Monday, April 13, 2015 13:43
> To: Stephen Rothwell
> Cc: Arnd Bergmann; Steven Rostedt; linux-next@...r.kernel.org; linux-
> kernel@...r.kernel.org; Winkler, Tomas
> Subject: Re: linux-next: build warnings after merge of the char-misc tree
> 
> On Mon, Apr 13, 2015 at 07:37:20PM +1000, Stephen Rothwell wrote:
> > Hi all,
> >
> > After merging the char-misc tree, today's linux-next build (x86_64
> > allmodconfig) produced these warnings:
> >
> > In file included from include/trace/define_trace.h:90:0,
> >                  from drivers/misc/mei/mei-trace.h:76,
> >                  from drivers/misc/mei/mei-trace.c:21:
> > include/trace/ftrace.h:28:0: warning: "TRACE_SYSTEM_STRING" redefined
> >  #define TRACE_SYSTEM_STRING
> __app(TRACE_SYSTEM_VAR,__trace_system_name)
> >  ^
> > In file included from include/trace/define_trace.h:83:0,
> >                  from drivers/misc/mei/mei-trace.h:76,
> >                  from drivers/misc/mei/mei-trace.c:21:
> > drivers/misc/mei/./mei-trace.h:29:0: note: this is the location of the previous
> definition
> >  #define TRACE_SYSTEM_STRING __stringify(TRACE_SYSTEM)
> >  ^
> > In file included from include/trace/ftrace.h:134:0,
> >                  from include/trace/define_trace.h:90,
> >                  from drivers/misc/mei/mei-trace.h:76,
> >                  from drivers/misc/mei/mei-trace.c:21:
> > drivers/misc/mei/./mei-trace.h:29:0: warning: "TRACE_SYSTEM_STRING"
> redefined
> >  #define TRACE_SYSTEM_STRING __stringify(TRACE_SYSTEM)
> >  ^
> > In file included from include/trace/define_trace.h:90:0,
> >                  from drivers/misc/mei/mei-trace.h:76,
> >                  from drivers/misc/mei/mei-trace.c:21:
> > include/trace/ftrace.h:28:0: note: this is the location of the previous definition
> >  #define TRACE_SYSTEM_STRING
> __app(TRACE_SYSTEM_VAR,__trace_system_name)
> >  ^
> > In file included from include/trace/define_trace.h:90:0,
> >                  from drivers/misc/mei/mei-trace.h:76,
> >                  from drivers/misc/mei/mei-trace.c:21:
> > include/trace/ftrace.h:28:0: warning: "TRACE_SYSTEM_STRING" redefined
> >  #define TRACE_SYSTEM_STRING
> __app(TRACE_SYSTEM_VAR,__trace_system_name)
> >  ^
> > In file included from include/trace/define_trace.h:83:0,
> >                  from drivers/misc/mei/mei-trace.h:76,
> >                  from drivers/misc/mei/mei-trace.c:21:
> > drivers/misc/mei/./mei-trace.h:29:0: note: this is the location of the previous
> definition
> >  #define TRACE_SYSTEM_STRING __stringify(TRACE_SYSTEM)
> >  ^
> > In file included from include/trace/ftrace.h:134:0,
> >                  from include/trace/define_trace.h:90,
> >                  from drivers/misc/mei/mei-trace.h:76,
> >                  from drivers/misc/mei/mei-trace.c:21:
> > drivers/misc/mei/./mei-trace.h:29:0: warning: "TRACE_SYSTEM_STRING"
> redefined
> >  #define TRACE_SYSTEM_STRING __stringify(TRACE_SYSTEM)
> >  ^
> > In file included from include/trace/define_trace.h:90:0,
> >                  from drivers/misc/mei/mei-trace.h:76,
> >                  from drivers/misc/mei/mei-trace.c:21:
> > include/trace/ftrace.h:28:0: note: this is the location of the previous definition
> >  #define TRACE_SYSTEM_STRING
> __app(TRACE_SYSTEM_VAR,__trace_system_name)
> >  ^
> >
> > Introduced by commit a0a927d06d79 ("mei: me: add io register tracing")
> > interacting with commit acd388fd3af3 ("tracing: Give system name a
> > pointer") from the ftrace tree.
> >
> > TRACE_SYSTEM_STRING should be removed from drivers/misc/mei/mei-
> trace.h
> > as it is not being used anywhere in the mei-trace code.
> 
> That's nice for such system-wide changes to be done at the last possible
> minute in the development cycle :(
> 
> Anyway, someone from the trace subsystem wish to send me a patch for
> this?
> 
> thanks,
Will send in few
Tomas

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