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    SubjectRe: [RFC 1/3] /dev/low_mem_notify
    On Tue, Jan 24, 2012 at 04:25:55PM +0000, Arnd Bergmann wrote:
    > On Tuesday 24 January 2012, Pekka Enberg wrote:
    > > On Tue, 2012-01-24 at 13:40 -0200, Marcelo Tosatti wrote:
    > > > What is the practical advantage of a syscall, again?
    > >
    > > Why do you ask? The advantage for this particular case is not needing to
    > > add ioctls() for configuration and keeping the file read/write ABI
    > > simple.
    >
    > The two are obviously equivalent and there is no reason to avoid
    > ioctl in general. However I agree that the syscall would be better
    > in this case, because that is what we tend to use for core kernel
    > functionality, while character devices tend to be used for I/O device
    > drivers that need stuff like enumeration and permission management.
    >
    > Arnd

    Makes sense.



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