man/io_uring_setup.2: add EPERM case for IORING_SETUP_SQPOLL
@@ -304,6 +304,11 @@ reached.
.TP
.BR ENOMEM
Insufficient kernel resources are available.
+.TP
+.BR EPERM
+.B IORING_SETUP_SQPOLL
+was specified, but the effective user ID of the caller did not have sufficient
+privileges.
.SH SEE ALSO
.BR io_uring_register(2),
.BR io_uring_enter(2)
