Messages in this thread |  | | Date | Sat, 10 Feb 2001 22:08:08 -0600 | From | Rick Richardson <> | Subject | Whats the rvmalloc() story? |
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I note that at least 5 device drivers have similar implementations of rvmalloc()/rvfree() et al:
ieee1394/video1394.c usb/ibmcam.c usb/ov511.c media/video/bttv-driver.c media/video/cpia.c
rvmalloc()/rvfree() are functions that are used to allocate large amounts of physically non-contiguous kernel virtual memory that will then be mmap()'ed into a user process.
I just got done writing a driver that needed rvmalloc() in order to do chip level simulation. Yank and put to the rescue.
Whats the story behind rvmalloc() et al? From what I could tell, about a year ago there were some patches to move rvmalloc() into vmalloc() as a blessed feature of the kernel. But it looks to me like these patches didn't "take".
Is there some other way of doing this now? If so, does somebody need to go into these drivers and patch them for the blessed way? If not, is there some plan in place to bless these functions and remvoe the code duplication?
-Rick
-- Rick Richardson rickr@mn.rr.com http://home.mn.rr.com/richardsons/ Twins Cities traffic animations are at http://members.nbci.com/tctraffic/#1 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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