[merged mm-hotfixes-stable] dma-kmsan-export-kmsan_handle_dma-for-modules.patch removed from -mm tree

[merged mm-hotfixes-stable] dma-kmsan-export-kmsan_handle_dma-for-modules.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: dma: kmsan: export kmsan_handle_dma() for modules
has been removed from the -mm tree.  Its filename was
     dma-kmsan-export-kmsan_handle_dma-for-modules.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: dma: kmsan: export kmsan_handle_dma() for modules
Date: Tue, 18 Feb 2025 10:14:11 +0100

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.

Link: https://lkml.kernel.org/r/20250218091411.MMS3wBN9@linutronix.de
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202502150634.qjxwSeJR-lkp@intel.com/
Fixes: 7ade4f10779c ("dma: kmsan: unpoison DMA mappings")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Macro Elver <elver@google.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kmsan/hooks.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/kmsan/hooks.c~dma-kmsan-export-kmsan_handle_dma-for-modules
+++ a/mm/kmsan/hooks.c
@@ -357,6 +357,7 @@ void kmsan_handle_dma(struct page *page,
 		size -= to_go;
 	}
 }
+EXPORT_SYMBOL_GPL(kmsan_handle_dma);
 
 void kmsan_handle_dma_sg(struct scatterlist *sg, int nents,
 			 enum dma_data_direction dir)
_

Patches currently in -mm which might be from bigeasy@linutronix.de are

rcu-provide-a-static-initializer-for-hlist_nulls_head.patch
ucount-replace-get_ucounts_or_wrap-with-atomic_inc_not_zero.patch
ucount-use-rcu-for-ucounts-lookups.patch
ucount-use-rcuref_t-for-reference-counting.patch

Re: [merged mm-hotfixes-stable] dma-kmsan-export-kmsan_handle_dma-for-modules.patch removed from -mm tree

[Alexander Potapenko]

On Thu, Mar 6, 2025 at 12:37 AM Andrew Morton <akpm@linux-foundation.org> wrote:
>
>
> The quilt patch titled
>      Subject: dma: kmsan: export kmsan_handle_dma() for modules
> has been removed from the -mm tree.  Its filename was
>      dma-kmsan-export-kmsan_handle_dma-for-modules.patch
>
> This patch was dropped because it was merged into the mm-hotfixes-stable branch
> of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>
> ------------------------------------------------------
> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Subject: dma: kmsan: export kmsan_handle_dma() for modules
> Date: Tue, 18 Feb 2025 10:14:11 +0100
>
> 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.
>
> Link: https://lkml.kernel.org/r/20250218091411.MMS3wBN9@linutronix.de
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202502150634.qjxwSeJR-lkp@intel.com/
> Fixes: 7ade4f10779c ("dma: kmsan: unpoison DMA mappings")
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Cc: Alexander Potapenko <glider@google.com>
> Cc: Dmitriy Vyukov <dvyukov@google.com>
> Cc: Macro Elver <elver@google.com>
> Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Note: I think the Reviewed-by: I left on the patch is missing here,
but I don't mind (no need to respin)