linux-kernel - Re: [RFC PATCH 1/1] arm64: implement live patching

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Message-ID: <20210607170154.GC10625@sirena.org.uk>
Date:   Mon, 7 Jun 2021 18:01:54 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Suraj Jitindar Singh <surajjs@...zon.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        live-patching@...r.kernel.org, catalin.marinas@....com,
        will@...nel.org, mark.rutland@....com,
        madvenka@...ux.microsoft.com, duwe@....de,
        sjitindarsingh@...il.com, benh@...nel.crashing.org
Subject: Re: [RFC PATCH 1/1] arm64: implement live patching

On Fri, Jun 04, 2021 at 04:59:30PM -0700, Suraj Jitindar Singh wrote:

> + * CONFIG_ARM64_BTI_KERNEL:
> + *	- Inserts a hint #0x22 on function entry if the function is called
> + *	  indirectly (to satisfy BTI requirements), which is inserted before
> + *	  the two nops from above.

Please write out the symbolic name of the HINT (BTI C here) rather than
the number, it helps with readability especially in a case like this
where there are multiple relevant hints.

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