[PATCH] pidhashing: lower PID_MAX_LIMIT for 32-bit machines

/proc/ breaks when PID_MAX_LIMIT is elevated on 32-bit, so this patch lowers
it there.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/threads.h

@@ -30,6 +30,6 @@
 /*
  * A maximum of 4 million PIDs should be enough for a while:
  */
-#define PID_MAX_LIMIT (4*1024*1024)
+#define PID_MAX_LIMIT (sizeof(long) > 4 ? 4*1024*1024 : PID_MAX_DEFAULT)
 
 #endif