Linux Headquarters - Kernel v2.4.17-pre7 /Documentation/DMA-mapping.txt

Kernel v2.4.17-pre7 /Documentation/DMA-mapping.txt

Filename:	/Documentation/DMA-mapping.txt
Lines Added:	3
Lines Deleted:	0
Also changed in:	(Previous) 2.4.17-pre6 2.4.17-pre5 2.4.13 2.4.13-pre6 2.4.13-pre5 2.4.13-pre4 (Following) 2.4.17-pre8 2.4.17-rc1 2.4.17-rc2 2.4.17 2.4.18pre1 2.4.18pre2

Location

2.4.17-pre7

Documentation

DMA-mapping.txt

Patch

diff -Nur --exclude=CVS linux-2.4.16/Documentation/DMA-mapping.txt linux/Documentation/DMA-mapping.txt
--- linux-2.4.16/Documentation/DMA-mapping.txt   Sun Dec  9 17:29:41 2001
+++ linux/Documentation/DMA-mapping.txt   Thu Dec  6 13:47:19 2001
@@ -60,6 +60,9 @@
 might be mapped somewhere entirely different than the rest of physical
 memory.
 
+Also, this means that you cannot take the return of a kmap()
+call and DMA to/from that.  This is similar to vmalloc().
+
 What about block I/O and networking buffers?  The block I/O and
 networking subsystems make sure that the buffers they use are valid
 for you to DMA from/to.

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