[PATCH] fix page size assumption in fork()

The attached patch fixes fork to get rid of the assumption that THREAD_SIZE
>= PAGE_SIZE (on the FR-V the smallest available page size is 16KB).
Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/fork.c

@@ -118,7 +118,11 @@ void __init fork_init(unsigned long mempages)
 	 * value: the thread structures can take up at most half
 	 * of memory.
 	 */
-	max_threads = mempages / (THREAD_SIZE/PAGE_SIZE) / 8;
+	if (THREAD_SIZE >= PAGE_SIZE)
+		max_threads = mempages / (THREAD_SIZE/PAGE_SIZE) / 8;
+	else
+		max_threads = mempages / 8;
+
 	/*
 	 * we need to allow at least 20 threads to boot a system
 	 */