[Q] comedi: vmap of the async->prealloc_buf
H Hartley Sweeten
hartleys at visionengravers.com
Thu Dec 20 17:09:13 UTC 2012
I have a question...
In the comedi core, the asynchronous 'prealloc_buf' is vmap'ed after
the page list has been allocated. The code in question looks like this:
vmap(pages, n_pages, VM_MAP, PAGE_KERNEL_NOCACHE);
vmap(pages, n_pages, VM_MAP, PAGE_KERNEL);
Is the #ifdef something left over from an older kernel?
Isn't PAGE_KERNEL_NOCACHE always defined?
Thanks for any insight,
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