From: Catalin Marinas <catalin.marinas@arm.com>
To: Derrick McKee <derrick.mckee@gmail.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: Removed MTE function
Date: Fri, 2 Apr 2021 13:34:16 +0100 [thread overview]
Message-ID: <20210402123415.GA2830@arm.com> (raw)
In-Reply-To: <CAJoBWHz5GdRVnYAuvCkVxcx8qFEMnkmLToSy4Lwckg1LptHfpA@mail.gmail.com>
On Fri, Apr 02, 2021 at 07:26:12AM -0400, Derrick McKee wrote:
> I was under the impression that MTE was mainlined in the kernel.
> However, the function mte_assign_mem_tag_range is not present in the
> 5.10 or later kernels. Was it removed or just that functionality
> isn't ready yet? If it was removed, why? Thanks.
It was added in commit 85f49cae4dfc ("arm64: mte: add in-kernel MTE
helpers") in 5.11 but moved out of mte.S by commit 2cb34276427a ("arm64:
kasan: simplify and inline MTE functions") in 5.12 and renamed to
mte_set_mem_tag_range(). Unfortunately, that commit did not delete the
old function prototypes in mte.h. I'll clean it up next week, unless
someone beats me to it with a patch.
What do you need this function for? It's supposed to be used only by
kasan, hence moved to mte-kasan.h.
--
Catalin
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next prev parent reply other threads:[~2021-04-02 12:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-02 11:26 Removed MTE function Derrick McKee
2021-04-02 12:34 ` Catalin Marinas [this message]
2021-04-16 17:58 ` Derrick McKee
2021-04-26 17:07 ` Catalin Marinas
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