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    SubjectRe: [PATCH] staging: comedi: serial2002: quiet NULL pointer sparse noise
    On 2012/06/08 07:51 AM, Dan Carpenter wrote:
    > On Fri, Jun 08, 2012 at 07:46:19AM +0100, Ian Abbott wrote:
    >> On 08/06/12 01:14, H Hartley Sweeten wrote:
    >>> Quiet a number of sparse warnings in this file:
    >>> warning: Using plain integer as NULL pointer
    >> I wonder why sparse warns about that for a literal, unadorned 0? I
    >> suppose NULL is more explicit, but a plain 0 means the same as NULL
    >> in a pointer context (unlike a zero from some random expression).

    Thanks for the link. I understand the intent to make null pointer
    constants easier to recognize. Still, the text of the sparse warning
    message "Using plain integer as NULL pointer" is technically incorrect
    since 0 is not an integer (plain or otherwise) in a pointer context,
    it's a null pointer constant.

    I wonder if it also issues that warning for a struct initializer such as
    {0} where the first member of the struct is a pointer, or would it
    expect you to use {NULL} which is more confusing when the struct
    contains a mixture of pointer and non-pointer members?

    -=( Ian Abbott @ MEV Ltd. E-mail: <> )=-
    -=( Tel: +44 (0)161 477 1898 FAX: +44 (0)161 718 3587 )=-

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      Last update: 2012-06-08 11:41    [W:0.043 / U:14.548 seconds]
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