The patch titled
Subject: dma: kmsan: export kmsan_handle_dma() for modules
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
dma-kmsan-export-kmsan_handle_dma-for-modules.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/dma-kmsan-export-kmsan_handle_dma-for-modules.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202502150634.qjxwSeJR-lkp@xxxxxxxxx/
Fixes: 7ade4f10779cb ("dma: kmsan: unpoison DMA mappings")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitriy Vyukov <dvyukov@xxxxxxxxxx>
Cc: Macro Elver <elver@xxxxxxxxxx>
Cc: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxxx are
dma-kmsan-export-kmsan_handle_dma-for-modules.patch
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
