sanitize <linux/prefetch.h> usage

Commit e66eed651fd1 ("list: remove prefetching from regular list
iterators") removed the include of prefetch.h from list.h, which
uncovered several cases that had apparently relied on that rather
obscure header file dependency.

So this fixes things up a bit, using

   grep -L linux/prefetch.h $(git grep -l '[^a-z_]prefetchw*(' -- '*.[ch]')
   grep -L 'prefetchw*(' $(git grep -l 'linux/prefetch.h' -- '*.[ch]')

to guide us in finding files that either need <linux/prefetch.h>
inclusion, or have it despite not needing it.

There are more of them around (mostly network drivers), but this gets
many core ones.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/mm/prio_tree.c b/mm/prio_tree.c
index 603ae98d9694..799dcfd7cd8c 100644
--- a/mm/prio_tree.c
+++ b/mm/prio_tree.c
@@ -13,6 +13,7 @@
 
 #include <linux/mm.h>
 #include <linux/prio_tree.h>
+#include <linux/prefetch.h>
 
 /*
  * See lib/prio_tree.c for details on the general radix priority search tree