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    Subject[patch 32/60] wait_task_stopped(): pass correct exit_code to wait_noreap_copyout()

    2.6.23-stable review patch. If anyone has any objections, please let us
    know.

    ------------------
    From: Scott James Remnant <scott@ubuntu.com>

    patch e6ceb32aa25fc33f21af84cc7a32fe289b3e860c in mainline.

    In wait_task_stopped() exit_code already contains the right value for the
    si_status member of siginfo, and this is simply set in the non WNOWAIT
    case.

    If you call waitid() with a stopped or traced process, you'll get the signal
    in siginfo.si_status as expected -- however if you call waitid(WNOWAIT) at the
    same time, you'll get the signal << 8 | 0x7f

    Pass it unchanged to wait_noreap_copyout(); we would only need to shift it
    and add 0x7f if we were returning it in the user status field and that
    isn't used for any function that permits WNOWAIT.

    Signed-off-by: Scott James Remnant <scott@ubuntu.com>
    Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
    Cc: Roland McGrath <roland@redhat.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    kernel/exit.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/kernel/exit.c
    +++ b/kernel/exit.c
    @@ -1365,7 +1365,7 @@ static int wait_task_stopped(struct task
    if (unlikely(!exit_code) || unlikely(p->exit_state))
    goto bail_ref;
    return wait_noreap_copyout(p, pid, uid,
    - why, (exit_code << 8) | 0x7f,
    + why, exit_code,
    infop, ru);
    }

    --


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