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authorFelix Fietkau <nbd@openwrt.org>2013-09-27 14:41:44 +0200
committerRalf Baechle <ralf@linux-mips.org>2014-01-22 20:43:10 +0100
commit885014bcf284cdfbe3428f2cfa3882edde5ff5fa (patch)
treecb0eeee346b51eb7af6c8cf8c49a046bb937f296 /arch/mips/mm
parent5792bf6438658cb129c3022aa2cf7e9b19b5de3a (diff)
downloadop-kernel-dev-885014bcf284cdfbe3428f2cfa3882edde5ff5fa.zip
op-kernel-dev-885014bcf284cdfbe3428f2cfa3882edde5ff5fa.tar.gz
MIPS: improve checks for noncoherent DMA
Only one MIPS development board actually supports enabling/disabling DMA coherency at runtime, so it's not a good idea to push the overhead of checking that configuration setting onto every other supported target as well. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/5912/
Diffstat (limited to 'arch/mips/mm')
-rw-r--r--arch/mips/mm/dma-default.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 2e94185..44b6dff 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -23,6 +23,7 @@
#include <dma-coherence.h>
+#ifdef CONFIG_DMA_MAYBE_COHERENT
int coherentio = 0; /* User defined DMA coherency from command line. */
EXPORT_SYMBOL_GPL(coherentio);
int hw_coherentio = 0; /* Actual hardware supported DMA coherency setting. */
@@ -42,6 +43,7 @@ static int __init setnocoherentio(char *str)
return 0;
}
early_param("nocoherentio", setnocoherentio);
+#endif
static inline struct page *dma_addr_to_page(struct device *dev,
dma_addr_t dma_addr)
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