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authorBjorn Helgaas <bhelgaas@google.com>2014-05-20 16:56:27 -0600
committerBjorn Helgaas <bhelgaas@google.com>2014-05-26 17:28:27 -0600
commitf311a724a79669ac0336932d0361325afdb54279 (patch)
tree1f86a93a676d25961f692ca5966ea1decb0a867f /Documentation/DMA-API-HOWTO.txt
parentace4b3fd67e771951d495aa1f1b1000984083362 (diff)
downloadlwn-f311a724a79669ac0336932d0361325afdb54279.tar.gz
lwn-f311a724a79669ac0336932d0361325afdb54279.zip
DMA-API: Capitalize "CPU" consistently
Sometimes we used "cpu," other times "CPU." Use "CPU" consistently. Suggested-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'Documentation/DMA-API-HOWTO.txt')
-rw-r--r--Documentation/DMA-API-HOWTO.txt8
1 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/DMA-API-HOWTO.txt b/Documentation/DMA-API-HOWTO.txt
index fd3727b94ac2..f59955303475 100644
--- a/Documentation/DMA-API-HOWTO.txt
+++ b/Documentation/DMA-API-HOWTO.txt
@@ -575,10 +575,10 @@ Incorrect example 2:
You should call dma_unmap_single() when the DMA activity is finished, e.g.,
from the interrupt which told you that the DMA transfer is done.
-Using cpu pointers like this for single mappings has a disadvantage:
+Using CPU pointers like this for single mappings has a disadvantage:
you cannot reference HIGHMEM memory in this way. Thus, there is a
map/unmap interface pair akin to dma_{map,unmap}_single(). These
-interfaces deal with page/offset pairs instead of cpu pointers.
+interfaces deal with page/offset pairs instead of CPU pointers.
Specifically:
struct device *dev = &my_dev->dev;
@@ -650,7 +650,7 @@ you could render the machine unusable by consuming all bus addresses.
If you need to use the same streaming DMA region multiple times and touch
the data in between the DMA transfers, the buffer needs to be synced
-properly in order for the cpu and device to see the most up-to-date and
+properly in order for the CPU and device to see the most up-to-date and
correct copy of the DMA buffer.
So, firstly, just map it with dma_map_{single,sg}(), and after each DMA
@@ -665,7 +665,7 @@ or:
as appropriate.
Then, if you wish to let the device get at the DMA area again,
-finish accessing the data with the cpu, and then before actually
+finish accessing the data with the CPU, and then before actually
giving the buffer to the hardware call either:
dma_sync_single_for_device(dev, dma_handle, size, direction);