Prefetch hint

[Matt Helsley <matthltc@us.ibm.com>]

[-- Attachment #1: task-watchers-prefetch --]
[-- Type: text/plain, Size: 996 bytes --]

Prefetch the entire array of function pointers.

Signed-off-by: Matt Helsley <matthltc@us.ibm.com>

---
 kernel/task_watchers.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-2.6.19/kernel/task_watchers.c
===================================================================
--- linux-2.6.19.orig/kernel/task_watchers.c
+++ linux-2.6.19/kernel/task_watchers.c
@@ -1,6 +1,7 @@
 #include <linux/init.h>
+#include <linux/prefetch.h>
 
 /* Defined in include/asm-generic/vmlinux.lds.h */
 extern const task_watcher_fn __start_task_init[],
 		__start_task_clone[], __start_task_exec[],
 		__start_task_uid[], __start_task_gid[],
@@ -30,10 +31,11 @@ int notify_task_watchers(unsigned int ev
 
 	tw_call = twtable[ev];
 	tw_end = twtable[ev + 1];
 
 	/* Call all of the watchers, report the first error */
+	prefetch_range(tw_call, tw_end - tw_call);
 	for (; tw_call < tw_end; tw_call++) {
 		err = (*tw_call)(val, tsk);
 		if (unlikely((err < 0) && (ret_err == 0)))
 			ret_err = err;
 	}

--