On Sat, 10 Feb 2007, Ralf Baechle wrote:
> Unfortunately struct epoll_event contains a gap so it bets on identical
> padding rules between native and compat ABI and anyway, padding is wasted
> space so the struct members should have been swapped when this structure
> was created. Oh well, too late.
You really should have needed padding in there, since even if you swapped
the members, sizeof(struct epoll_event) would still need to be 16, if
alignof(u64) == 8. Either adding an extra auxilliary u32, or make the two
members be u64, would have been ok.
I'll be posting a patch that adds the compat_ layer for epoll in
kernel/compat.c. Architectures that needs it (currently only ARM-EABI and
IA64 use a compat code for epoll), should wire them up.
- Davide
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