mm/page_isolation.c: change the prototype of undo_isolate_page_range()

undo_isolate_page_range() never fails, so no need to return value.

Link: http://lkml.kernel.org/r/1562075604-8979-1-git-send-email-kernelfans@gmail.com
Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Qian Cai <cai@lca.pw>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h
index 280ae96dc4c300d29418ececeb5e9b91acf27e2e..1099c2fee20f6c8abc1087e327142abc41ccc831 100644 (file)
--- a/include/linux/page-isolation.h
+++ b/include/linux/page-isolation.h
@@ -50,7 +50,7 @@ start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
  * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
  * target range is [start_pfn, end_pfn)
  */
-int
+void
 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
                        unsigned migratetype);
 

diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index e3638a5bafff9b7058e4176973bc965fbb11a4cd..89c19c0feadb95374a9724af6d98f962c1b8768b 100644 (file)
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -230,7 +230,7 @@ undo:
 /*
  * Make isolated pages available again.
  */
-int undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
+void undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
                            unsigned migratetype)
 {
        unsigned long pfn;
@@ -247,7 +247,6 @@ int undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
                        continue;
                unset_migratetype_isolate(page, migratetype);
        }
-       return 0;
 }
 /*
  * Test all pages in the range is free(means isolated) or not.