I am having a strange problem with the poll() routine. I compiled a module under AIX 5.2 using the poll routine, it worked fine. When the OS was upgraded to AIX 5.3 the poll routine return an error code.

Here is a summary of the code:

#define MAX_EVENTS 300
long eventCount;
POLLIST(MAX_EVENTS,MAX_EVENTS) pList; /* defined in the the /usr/include/sys/poll.h file */
…….
…….
eventCount = poll( &pList, (long)((MAX_EVENTS<<16)|(MAX_EVENTS)),
(long) 0 );


The above call returns -1 and the global variable errno is set to 22 (EINVAL) under AIX 5.3, BUT works fine under AIX 5.2.

I have not changed the code. Can you anyone explain why this is no longer working?

Thanks,
Tahir