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Date: Fri, 20 Oct 2017 10:57:22 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Alexei Starovoitov <ast@kernel.org>,
        Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>,
        "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>, "H . Peter Anvin" <hpa@zytor.com>,
        Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
        "David S . Miller" <davem@davemloft.net>,
        Kees Cook <keescook@chromium.org>,
        Ian McDonald <ian.mcdonald@jandi.co.nz>,
        Vlad Yasevich <vyasevich@gmail.com>,
        Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [RFC PATCH -tip 1/5] kprobes: Use ENOTSUPP instead of ENOSYS
Message-ID: <20171020085722.n422sxot6k7kipjy@gmail.com>
References: <150724519527.5014.10207042218696587159.stgit@devbox>
 <150724523678.5014.7179010055808035742.stgit@devbox>
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* Masami Hiramatsu <mhiramat@kernel.org> wrote:

> Use ENOTSUPP instead of ENOSYS because ENOSYS is reserved
> only for invalid syscall number.

Is this actually true? We use -ENOSYS in a ton of code in kernel/ already, not 
just for non-existing syscall number.

	Ingo