linux-kernel - Re: [PATCH v3 5/6] x86/ftrace: Use text

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Message-ID: <20191015183130.GR2359@hirez.programming.kicks-ass.net>
Date:   Tue, 15 Oct 2019 20:31:30 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Jessica Yu <jeyu@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org, mhiramat@...nel.org,
        bristot@...hat.com, jbaron@...mai.com,
        torvalds@...ux-foundation.org, tglx@...utronix.de,
        mingo@...nel.org, namit@...are.com, hpa@...or.com, luto@...nel.org,
        ard.biesheuvel@...aro.org, jpoimboe@...hat.com, rabin@....in,
        Mark Rutland <mark.rutland@....com>,
        Will Deacon <will@...nel.org>, james.morse@....com
Subject: Re: [PATCH v3 5/6] x86/ftrace: Use text_poke()

On Tue, Oct 15, 2019 at 04:42:58PM +0200, Peter Zijlstra wrote:
> On Tue, Oct 15, 2019 at 03:56:34PM +0200, Peter Zijlstra wrote:
> > Right, the problem is set_all_modules_text_*(), that relies on COMING
> > having made the protection changes.
> > 
> > After the x86 changes, there's only 2 more architectures that use that
> > function. I'll work on getting those converted and then we can delete
> > that function and worry no more about it.
> 
> Here's a possible patch for arch/arm, which only leaves arch/nds32/.

*sigh*, so I'd written the patching code for nds32, but then discovered
it doesn't have STRICT_MODULE_RWX and therefore we can simply delete the
thing.