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nexedi
linux
Commits
0dc294c0
Commit
0dc294c0
authored
Nov 11, 2014
by
Ralf Baechle
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MIPS: DMA: Explain the lack of special handling for R14000/R16000.
Signed-off-by:
Ralf Baechle
<
ralf@linux-mips.org
>
parent
341097f1
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arch/mips/mm/dma-default.c
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arch/mips/mm/dma-default.c
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0dc294c0
...
@@ -61,6 +61,11 @@ static inline struct page *dma_addr_to_page(struct device *dev,
...
@@ -61,6 +61,11 @@ static inline struct page *dma_addr_to_page(struct device *dev,
* Warning on the terminology - Linux calls an uncached area coherent;
* Warning on the terminology - Linux calls an uncached area coherent;
* MIPS terminology calls memory areas with hardware maintained coherency
* MIPS terminology calls memory areas with hardware maintained coherency
* coherent.
* coherent.
*
* Note that the R14000 and R16000 should also be checked for in this
* condition. However this function is only called on non-I/O-coherent
* systems and only the R10000 and R12000 are used in such systems, the
* SGI IP28 Indigo² rsp. SGI IP32 aka O2.
*/
*/
static
inline
int
cpu_needs_post_dma_flush
(
struct
device
*
dev
)
static
inline
int
cpu_needs_post_dma_flush
(
struct
device
*
dev
)
{
{
...
...
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