linux-kernel - Re: [PATCH] dma: kmsan: Export kmsan_handle

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Message-Id: <20250218161230.0d06d45190b1ecdbf9e97564@linux-foundation.org>
Date: Tue, 18 Feb 2025 16:12:30 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: kasan-dev@...glegroups.com, linux-mm@...ck.org, Alexander Potapenko
 <glider@...gle.com>, Marco Elver <elver@...gle.com>, Dmitry Vyukov
 <dvyukov@...gle.com>, kernel test robot <lkp@...el.com>, Peter Zijlstra
 <peterz@...radead.org>, llvm@...ts.linux.dev,
 oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org, Thomas
 Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] dma: kmsan: Export kmsan_handle_dma() for modules.

On Tue, 18 Feb 2025 10:14:11 +0100 Sebastian Andrzej Siewior <bigeasy@...utronix.de> wrote:

> kmsan_handle_dma() is used by virtio_ring() which can be built as a
> module. kmsan_handle_dma() needs to be exported otherwise building the
> virtio_ring fails.
> 
> Export kmsan_handle_dma for modules.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202502150634.qjxwSeJR-lkp@intel.com/
> Fixes: 7ade4f10779cb ("dma: kmsan: unpoison DMA mappings")

It's strange that this took a few years to be noticed.

Thanks, I added cc:stable to this.