linux-kernel - Re: [PATCH v2] tracing, printk: Force no hashing when trace

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Message-ID: <20180404023455.GA493@jagdpanzerIV>
Date:   Wed, 4 Apr 2018 11:34:55 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Kees Cook <keescook@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "Tobin C. Harding" <me@...in.cc>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Laight <David.Laight@...lab.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Petr Mladek <pmladek@...e.com>
Subject: Re: [PATCH v2] tracing, printk: Force no hashing when trace_printk()
 is used

On (04/03/18 18:03), Steven Rostedt wrote:
> 
> > he'd want you to change all the trace_printk()s to %px with
> > justifications, though.
> 
> What trace_printk()s do you want to change? They are throw away
> functions. trace_printk() is not something that stays in the kernel.
> It's added during debugging and then removed before submitting what you
> are working on upstream.

Seems that your patch also can fix up bpf_trace_printk() - it doesn't
even support %px, only hashed %p, which it passes to __trace_printk().

	-ss