[PATCH] more kernel-doc cleanups, additions

Various core kernel-doc cleanups:
- add missing function parameters in ipc, irq/manage, kernel/sys,
  kernel/sysctl, and mm/slab;
- move description to just above function for kernel_restart()

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/slab.c b/mm/slab.c
index 1db4d73..e291f5e 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3263,6 +3263,7 @@
 
 /**
  * cache_reap - Reclaim memory from caches.
+ * @unused: unused parameter
  *
  * Called from workqueue/eventd every few seconds.
  * Purpose: