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epoll.7: Note existence of kcmp() KCMP_EPOLL_TFD operation 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2017-10-09 11:45:13 +02:00
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6
man7/epoll.7
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@ -583,6 +583,12 @@ directory.
See
.BR proc (5)
for further details.
.PP
The
.BR kcmp (2)
.B KCMP_EPOLL_TFD
operation can be used to test whether a file descriptor
is present in an epoll instance.
.SH SEE ALSO
.BR epoll_create (2),
.BR epoll_create1 (2),