6.12-stable review patch. If anyone has any objections, please let me know.
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From: Sebastian Andrzej Siewior bigeasy@linutronix.de
commit 19fac3c93991502a22c5132824c40b6a2e64b136 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/kmsan/hooks.c | 1 + 1 file changed, 1 insertion(+)
--- a/mm/kmsan/hooks.c +++ b/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)