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    SubjectRe: 2.6.15-rt1
    > I get this compiling 15-rt1:
    >
    > ,----
    > | CC net/ipv6/mcast.o
    > | net/ipv6/mcast.c: In function `ipv6_sock_mc_join':
    > | net/ipv6/mcast.c:227: error: `RW_LOCK_UNLOCKED' undeclared (first use in this function)
    > | net/ipv6/mcast.c:227: error: (Each undeclared identifier is reported only once
    > | net/ipv6/mcast.c:227: error: for each function it appears in.)
    > | make[2]: *** [net/ipv6/mcast.o] Error 1
    > `----
    >
    > I take it something on the order of this is needed?:
    >
    > - mc_lst->sflock = RW_LOCK_UNLOCKED;
    > + mc_lst->sflock = RW_LOCK_UNLOCKED(foo.bar);
    >
    > for some foo.bar, yes?
    >
    > Or is it?:
    >
    > - mc_lst->sflock = RW_LOCK_UNLOCKED;
    > + rwlock_init(mc_lst->sflock);
    >
    > I'm trying the latter now, but won't be able to reboot for
    > a runtime test for a while....
    >

    Take a look at the 15-rt1-sr1 patch it has a fix for this
    there was also a fix posted earlier in the thread :)

    and its:
    - mc_lst->sflock = RW_LOCK_UNLOCKED;
    + mc_lst->sflock = RW_LOCK_UNLOCKED(mc_list->fslock);

    - David Brown
    -
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