From: "Randy Macleod" <macleodr@nortel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When polling a connected pipe socket for writability, there is an
intrinsic race condition whereby writability might be lost between the
polling and the writing system calls. In this case, the socket will
-block until write because possible again, unless non-blocking mode
-becomes enabled.
+block until write becomes possible again, unless non-blocking mode
+is enabled.
The pipe protocol provides two socket options at the SOL_PNPIPE level: