[PATCH][3/4] poll()/select() timeout behavior

["Bill Rugolsky Jr." <brugolsky@telemetry-investments.com>]

This patch changes select() and poll() to not wait forever when a valid,
but large timeout value is supplied.  The SUSv3 manual page for select(2)
states:

  "If the timeout argument specifies a timeout interval greater than the
  implementation-defined maximum value, the maximum value shall be used as
  the actual timeout value."

Both select() and poll() have a well-defined mechanism to wait forever,
so there is no need for the existing behavior.

Please apply.

    Bill Rugolsky
            
--- linux/fs/select.c	2004-02-20 14:27:24.784616879 -0500
+++ linux/fs/select.c	2004-02-20 14:27:28.264660774 -0500
@@ -316,6 +316,8 @@
 		if ((unsigned long) sec < (MAX_SCHEDULE_TIMEOUT-1) / HZ - 1) {
 			timeout = ROUND_UP(usec, 1000000/HZ);
 			timeout += sec * (unsigned long) HZ;
+		} else {
+			timeout = MAX_SCHEDULE_TIMEOUT-1;
 		}
 	}
 
@@ -476,7 +478,7 @@
 			if (seconds <= (MAX_SCHEDULE_TIMEOUT-2) / HZ - 1)
 				timeout += seconds*HZ;
 			else
-				timeout = MAX_SCHEDULE_TIMEOUT;
+				timeout = MAX_SCHEDULE_TIMEOUT-1;
 		}
 	}