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    Subject[PATCH] netlink: fix gcc -Wconversion compilation warning
    Date
    From: Dmitry V. Levin <ldv@altlinux.org>

    $ cat << EOF | gcc -Wconversion -xc -S -o/dev/null -
    unsigned f(void) {return NLMSG_HDRLEN;}
    EOF
    <stdin>: In function 'f':
    <stdin>:3:26: warning: negative integer implicitly converted to unsigned type

    Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
    Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
    ---
    include/linux/netlink.h | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/include/linux/netlink.h b/include/linux/netlink.h
    index 1235669..e2b9e63 100644
    --- a/include/linux/netlink.h
    +++ b/include/linux/netlink.h
    @@ -70,7 +70,7 @@ struct nlmsghdr {
    Check NLM_F_EXCL
    */

    -#define NLMSG_ALIGNTO 4
    +#define NLMSG_ALIGNTO 4U
    #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
    #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
    #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))
    --
    1.7.3.3


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