[116/192] mm/vmalloc: include header for prototype of set_iounmap_nonlazy

Commit Message

Andrew Morton July 1, 2021, 1:53 a.m. UTC

From: Mel Gorman <[e-mail]>
Subject: mm/vmalloc: include header for prototype of set_iounmap_nonlazy

make W=1 generates the following warning for mm/vmalloc.c

  mm/vmalloc.c:1599:6: warning: no previous prototype for `set_iounmap_nonlazy' [-Wmissing-prototypes]
   void set_iounmap_nonlazy(void)
        ^~~~~~~~~~~~~~~~~~~

This is an arch-generic function only used by x86.  On other arches, it's
dead code.  Include the header with the definition and make it x86-64
specific.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Mel Gorman <[e-mail]>
Reviewed-by: Yang Shi <[e-mail]>
Acked-by: Vlastimil Babka <[e-mail]>
Cc: Dan Streetman <[e-mail]>
Cc: David Hildenbrand <[e-mail]>
Cc: Michal Hocko <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/vmalloc.c |    3 +++
 1 file changed, 3 insertions(+)

Patch

--- a/mm/vmalloc.c~mm-vmalloc-include-header-for-prototype-of-set_iounmap_nonlazy
+++ a/mm/vmalloc.c
@@ -25,6 +25,7 @@ 
 #include <linux/notifier.h>
 #include <linux/rbtree.h>
 #include <linux/xarray.h>
+#include <linux/io.h>
 #include <linux/rcupdate.h>
 #include <linux/pfn.h>
 #include <linux/kmemleak.h>
@@ -1607,6 +1608,7 @@  static DEFINE_MUTEX(vmap_purge_lock);
 /* for per-CPU blocks */
 static void purge_fragmented_blocks_allcpus(void);
 
+#ifdef CONFIG_X86_64
 /*
  * called before a call to iounmap() if the caller wants vm_area_struct's
  * immediately freed.
@@ -1615,6 +1617,7 @@  void set_iounmap_nonlazy(void)
 {
 	atomic_long_set(&vmap_lazy_nr, lazy_max_pages()+1);
 }
+#endif /* CONFIG_X86_64 */
 
 /*
  * Purges all lazily-freed vmap areas.