Query regarding dma_alloc()

[sandeep kumar]

Hi all,
What is the difference between the following memory allocations.

1) Memory allocation by doing,
      char *buf;
      buf = kmalloc(BUF_LEN, *GFP_DMA* | GFP_KERNEL);

2) And by
      char *buf;
      buf = dma_alloc(...);

in the link http://www.arm.linux.org.uk/developer/memory.txt
it says that dma_alloc() returns virtual address in "ffc00000-----fffeffff"
this region,

while in the first case it is returning Virtual address in "low-memory"
region.

For DMA mappable memory which one we should use..?



-- 
With regards,
Sandeep Kumar Anantapalli,
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