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    SubjectRe: [PATCH] net/compat: fix dev_ifsioc emulation corner cases
    From: Arnd Bergmann <>
    Date: Wed, 11 Nov 2009 14:39:40 +0100

    > Handling for SIOCSHWTSTAMP is broken on architectures
    > with a split user/kernel address space like s390,
    > because it passes a real user pointer while using
    > set_fs(KERNEL_DS).
    > A similar problem might arise the next time somebody
    > adds code to dev_ifsioc.
    > Split up dev_ifsioc into three separate functions for
    > SIOCSHWTSTAMP, SIOC*IFMAP and all other numbers so
    > we can get rid of set_fs in all potentially affected
    > cases.
    > Signed-off-by: Arnd Bergmann <>


    > Resending this one as well, rebased to current net-next.
    > Please tell me if you want a backport to 2.6.32 or -stable
    > for this one.


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