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    SubjectRe: linux-next: upstream tree build warnings
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    From: Stephen Rothwell <sfr@canb.auug.org.au>
    Date: Thu, 23 Apr 2009 16:38:47 +1000

    > Today's linux-next build (powerpc allyesconfig gcc4.4.0) produced these
    > warnings:
    >
    > drivers/net/virtio_net.c: In function 'virnet_vlan_rx_add_vid':
    > include/linux/scatterlist.h:57: warning: 'sg' is used uninitialized in this function
    > drivers/net/virtio_net.c:746: note: 'sg' was declared here
    > drivers/net/virtio_net.c: In function 'virnet_vlan_rx_kill_vid':
    > include/linux/scatterlist.h:57: warning: 'sg' is used uninitialized in this function
    > drivers/net/virtio_net.c:758: note: 'sg' was declared here
    >
    > in each case, sg is uninitialised when its address is passed to
    > sg_set_buf() which passes it to gs_set_page() which passes it to
    > sg_assign_page() which dereferences it (to use ->page_link).

    I wonder if this is a side effect of changes that went in via Rusty's
    tree? I don't remember touching this driver in a while.



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