Hi, Ramji, Thanks for the explanation of the use after free. I went ahead and ran the patch through the libaio test suite and it passed. > -#define POLLFREE (__force __poll_t)0x4000 /* currently only for epoll */ > +#define POLLFREE ((__force __poll_t)0x4000) You added parenthesis, here, and I'm not sure if that's a necessary part of this patch. Other than that: Reviewed-by: Jeff Moyer <jmoyer@xxxxxxxxxx>