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Subject: Re: [PATCH V3 8/9] tracing: Add osnoise tracer
To:     Steven Rostedt <rostedt@goodmis.org>
Cc:     linux-kernel@vger.kernel.org, Phil Auld <pauld@redhat.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Kate Carcia <kcarcia@redhat.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Alexandre Chartre <alexandre.chartre@oracle.com>,
        Clark Willaims <williams@redhat.com>,
        John Kacur <jkacur@redhat.com>,
        Juri Lelli <juri.lelli@redhat.com>, linux-doc@vger.kernel.org
References: <cover.1621024265.git.bristot@redhat.com>
 <bd09a2be9cd0cecee86374dbb49235dd2ef9d750.1621024265.git.bristot@redhat.com>
 <20210604172803.527aa070@oasis.local.home>
From:   Daniel Bristot de Oliveira <bristot@redhat.com>
Message-ID: <06d72b7d-4beb-1dff-b537-e7449abf3d4e@redhat.com>
Date:   Wed, 9 Jun 2021 14:14:17 +0200
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On 6/4/21 11:28 PM, Steven Rostedt wrote:
>> +#ifdef CONFIG_X86_LOCAL_APIC
> I wonder if we should move this into a separate file, making the
> __trace_irq_entry() a more name space safe name and have it call that.
> I have a bit of a distaste for arch specific code in a generic file.
> 

I am placing the intel specific file in:

arch/x86/kernel/trace_osnoise.c

and the kernel/trace/trace_osnoise.h looks like this:

#ifdef CONFIG_X86_LOCAL_APIC
int osnoise_arch_register(void);
int osnoise_arch_unregister(void);
#else /* CONFIG_X86_LOCAL_APIC */
#define osnoise_arch_register() do {} while (0)
#define osnoise_arch_unregister() do {} while (0)
#endif /* CONFIG_X86_LOCAL_APIC */

This can be used by other archs as well...

sound reasonable?

-- Daniel


>> +/**
>> + * trace_intel_irq_entry - record intel specific IRQ entry
>> + */
>> +void trace_intel_irq_entry(void *data, int vector)
>> +{
>> +	__trace_irq_entry(vector);
>> +}
>> +