linux-kernel - Re: [PATCH] tracing: fix a build error on alpha and m68k

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Date:	Thu, 23 Oct 2008 18:38:50 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] tracing: fix a build error on alpha and m68k


* Alexey Dobriyan <adobriyan@...il.com> wrote:

> On Thu, Oct 23, 2008 at 07:27:48PM +0200, Frederic Weisbecker wrote:
> > When tracing is enabled, some arch have included <linux/irqflags.h>
> > on their <asm/system.h> but others like alpha or m68k don't.
> > 
> > Build error on alpha:
> > 
> > kernel/trace/trace.c: In function 'tracing_generic_entry_update':
> > kernel/trace/trace.c:658: error: implicit declaration of function 'irqs_disabled_flags'
> > kernel/trace/trace.c: In function 'tracing_cpumask_write':
> > kernel/trace/trace.c:2145: error: implicit declaration of function 'raw_local_irq_disable'
> > kernel/trace/trace.c:2162: error: implicit declaration of function 'raw_local_irq_enable'
> > kernel/trace/trace.c: In function 'trace_die_handler':
> > kernel/trace/trace.c:3039: error: 'DIE_OOPS' undeclared (first use in this function)
> > 
> > Build error on m68k:
> > http://kisskb.ellerman.id.au/kisskb/buildresult/50641/
> > 
> > 
> > Include it on kernel/trace/trace.c
> > 
> > Reported-by: Alexey Dobriyan <adobriyan@...il.com>
> > Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
> > ---
> > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> > index 78d5661..deb9684 100644
> > --- a/kernel/trace/trace.c
> > +++ b/kernel/trace/trace.c
> > @@ -34,6 +34,7 @@
> >  
> >  #include <linux/stacktrace.h>
> >  #include <linux/ring_buffer.h>
> > +#include <linux/irqflags.h>
> 
> Sure, except it doesn't fix anything.

hm, zapped the commit then.

the problem is most likely that none of these architectures is lockdep 
enabled, hence they have no irqtrace wrappers, hence not all of the 
tracers can be built on them?

	Ingo
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