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    SubjectRe: -mm merge plans for 2.6.21
    FromDavid Woodhouse <>
    DateSat, 10 Feb 2007 10:32:07 +0000
    On Sat, 2007-02-10 at 11:22 +0100, Heiko Carstens wrote:
    > Which remembers me that I think that MIPS is using the non-compat version
    > of sys_epoll_pwait for compat syscalls. But maybe MIPS doesn't need a compat
    > syscall for some reason. Dunno. 
    
    It's OK as long as the 64-bit kernel, N32 and O32 userspace all agree
    there there's 32 bits of padding between the fields of this structure:
    
    struct epoll_event {
            __u32 events;
            __u64 data;
    };
    I suspect it's a fairly safe bet that N32 userspace agrees; if the O32
    ABI is different then it would need the compat syscall.
    
    -- 
    dwmw2
    
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