On Thu, May 23, 2019 at 08:59:30PM -0600, dann frazier wrote:

quoted

quoted

diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c
index b2a87905846d..21f39a6cb04f 100644
--- a/kernel/dma/contiguous.c
+++ b/kernel/dma/contiguous.c

@@ -214,6 +214,54 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages,
        return cma_release(dev_get_cma_area(dev), pages, count);
 }

This breaks the build for me if CONFIG_DMA_CMA=n:

  LD [M]  fs/9p/9p.o
ld: fs/9p/vfs_inode.o: in function `dma_alloc_contiguous':
vfs_inode.c:(.text+0xa60): multiple definition of
`dma_alloc_contiguous'; fs/9p/vfs_super.o:vfs_super.c:(.text+0x500):
first defined here

Do the following insertions need to be under an #ifdef CONFIG_DMA_CMA ?

Ah, no - the problem is actually a missing "static inline" in the
!CONFIG_DMA_CMA version of dma_alloc_contiguous().

Yea, I saw it. Thanks for the testing and pointing it out.

Sending v3.....

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