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| author |   Dan Williams <dan.j.williams@intel.com> | 2007-07-15 23:40:26 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:45 -0700 |
| commit | 1b0fac45878bb88759eec347c273285195649ff7 (patch) | |
| tree | a9871a47ef98c90bac3f65a7f9309e87420c694c /include/linux/dma-mapping.h | |
| parent | fs: clarify "dummy" member in struct inodes_stat_t (diff) | |
| download | linux-dev-1b0fac45878bb88759eec347c273285195649ff7.tar.xz linux-dev-1b0fac45878bb88759eec347c273285195649ff7.zip | |
dma-mapping: prevent dma dependent code from linking on !HAS_DMA archs
Continuing the work started in 411f0f3edc141a582190d3605cadd1d993abb6df ...
This enables code with a dma path, that compiles away, to build without
requiring additional code factoring. It also prevents code that calls
dma_alloc_coherent and dma_free_coherent from linking whereas previously
the code would hit a BUG() at run time. Finally, it allows archs that set
!HAS_DMA to delete their asm/dma-mapping.h file.
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: Kyle McMartin <kyle@parisc-linux.org>
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: <geert@linux-m68k.org>
Cc: <zippel@linux-m68k.org>
Cc: <spyro@f2s.com>
Cc: <ysato@users.sourceforge.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/dma-mapping.h')
| -rw-r--r-- | include/linux/dma-mapping.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 9a663c6db16a..2dc21cbeb304 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -31,7 +31,11 @@ static inline int valid_dma_direction(int dma_direction) (dma_direction == DMA_FROM_DEVICE)); } +#ifdef CONFIG_HAS_DMA #include <asm/dma-mapping.h> +#else +#include <asm-generic/dma-mapping-broken.h> +#endif /* Backwards compat, remove in 2.7.x */ #define dma_sync_single dma_sync_single_for_cpu |