Re: pci-sysfs resource mmap broken (and PATCH)

From: David S. Miller (davem_at_davemloft.net)
Date: 04/29/05

  • Next message: Venkatesan, Ganesh: "msleep_interruptible() in ethtool ioctl and keyboard input" 
    Date:	Fri, 29 Apr 2005 08:42:42 -0700
To: Grant Grundler <grundler@parisc-linux.org>

    On Thu, 28 Apr 2005 17:38:28 -0600
    Grant Grundler <grundler@parisc-linux.org> wrote:

    > I suspect the MAP_* attribute/hint needs to be passed in together
    > with the mmap call if any arch (ia64?) would return a different
    > virtual address depending the attribute (e.g cached vs uncached).

    The only problem could me getting the generic mmap() code to
    properly pass the flag down into the driver, I seem to recall
    that it either does an -EINVAL or masks out any flags which
    are not in the standard set.

    But then again this conflicts with what I remember seeing in the
    XFree86 PCI support, in that IA64 passed in such a mmap() flag
    to indicate a framebuffer like mapping that didn't need a guard-like
    bit to be set.

    Someone should look at the code to make sure :-)

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  • Next message: Venkatesan, Ganesh: "msleep_interruptible() in ethtool ioctl and keyboard input"

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