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* [PATCH] arm: dma-mapping: fix compilation error when CONFIG_MMU is not present
@ 2014-10-19 15:59 ` Stefan Hengelein
  0 siblings, 0 replies; 15+ messages in thread
From: Stefan Hengelein @ 2014-10-19 15:59 UTC (permalink / raw)
  To: linux-arm-kernel

When CONFIG_MMU is not present, the variable 'atomic_pool' and the
function '__in_atomic_pool' are undeclared but used in part of the
code. Therefore, the compilation breaks.
Now, they are defined to dummy values when CONFIG_MMU is undefined.

This error was found with vampyr.

Signed-off-by: Stefan Hengelein <stefan.hengelein@fau.de>
---
 arch/arm/mm/dma-mapping.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index c245d90..7d04cf7 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -573,12 +573,14 @@ static inline pgprot_t __get_dma_pgprot(struct dma_attrs *attrs, pgprot_t prot)
 #else	/* !CONFIG_MMU */
 
 #define nommu() 1
+#define atomic_pool 0
 
 #define __get_dma_pgprot(attrs, prot)	__pgprot(0)
 #define __alloc_remap_buffer(dev, size, gfp, prot, ret, c)	NULL
 #define __alloc_from_pool(size, ret_page)			NULL
 #define __alloc_from_contiguous(dev, size, prot, ret, c)	NULL
 #define __free_from_pool(cpu_addr, size)			0
+#define __in_atomic_pool(start, size)				0
 #define __free_from_contiguous(dev, page, cpu_addr, size)	do { } while (0)
 #define __dma_free_remap(cpu_addr, size)			do { } while (0)
 
-- 
1.9.1

^ permalink raw reply related	[flat|nested] 15+ messages in thread

end of thread, other threads:[~2014-10-27 11:59 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz follow: Atom feed
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2014-10-19 15:59 [PATCH] arm: dma-mapping: fix compilation error when CONFIG_MMU is not present Stefan Hengelein
2014-10-19 15:59 ` Stefan Hengelein
2014-10-20  7:42 ` Marek Szyprowski
2014-10-20  7:42   ` Marek Szyprowski
2014-10-20 13:50   ` Stefan Hengelein
2014-10-21  0:05     ` Laura Abbott
2014-10-21  0:05       ` Laura Abbott
     [not found]       ` <5445A345.7010401-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2014-10-23  8:15         ` Marek Szyprowski
2014-10-23  8:15           ` Marek Szyprowski
2014-10-23  8:15           ` Marek Szyprowski
2014-10-24 13:15           ` Stefan Hengelein
2014-10-24 13:15             ` Stefan Hengelein
     [not found]             ` <CABv5NL_E83CgBcHbAqo9xejWAEamO3oxX6ZjU+fo9X6k4cE_1w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-27 11:59               ` Marek Szyprowski
2014-10-27 11:59                 ` Marek Szyprowski
2014-10-27 11:59                 ` Marek Szyprowski

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