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    SubjectRe: [PATCH] sparc: copy_from_user() should not return -EFAULT
    On Tuesday 05 January 2010, Heiko Carstens wrote:
    > Subject: [PATCH] sparc: copy_from_user() should not return -EFAULT
    > From: Heiko Carstens <>
    > Callers of copy_from_user() expect it to return the number of bytes
    > it could not copy. In no case it is supposed to return -EFAULT.
    > In case of a detected buffer overflow just return the requested
    > length. In addition one could think of a memset that would clear
    > the size of the target object.
    > Signed-off-by: Heiko Carstens <>

    The xtensa clear_user function seems to have a similar issue,
    it should return size on failure, not -EFAULT.


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