mm/page_alloc.c: rename free_pages_check_bad() to check_free_page_bad()

free_pages_check_bad() is the counterpart of check_new_page_bad().  Rename
it to use the same naming convention.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Link: http://lkml.kernel.org/r/20200411220357.9636-4-richard.weiyang@gmail.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/page_alloc.c

@@ -1070,7 +1070,7 @@ static inline bool page_expected_state(struct page *page,
 	return true;
 }
 
-static void free_pages_check_bad(struct page *page)
+static void check_free_page_bad(struct page *page)
 {
 	const char *bad_reason = NULL;
 
@@ -1095,7 +1095,7 @@ static inline int free_pages_check(struct page *page)
 		return 0;
 
 	/* Something has gone sideways, find it */
-	free_pages_check_bad(page);
+	check_free_page_bad(page);
 	return 1;
 }