mm: uninline page_mapped()

It's huge.  Uninlining it saves 206 bytes per callsite.  Shaves 4924
bytes from the x86_64 allmodconfig vmlinux.

[akpm@linux-foundation.org: coding-style fixes]
Cc: Steve Capper <steve.capper@arm.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5b37513..9c2852c 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1032,26 +1032,7 @@ static inline pgoff_t page_file_index(struct page *page)
        return page->index;
 }
 
-/*
- * Return true if this page is mapped into pagetables.
- * For compound page it returns true if any subpage of compound page is mapped.
- */
-static inline bool page_mapped(struct page *page)
-{
-       int i;
-       if (likely(!PageCompound(page)))
-               return atomic_read(&page->_mapcount) >= 0;
-       page = compound_head(page);
-       if (atomic_read(compound_mapcount_ptr(page)) >= 0)
-               return true;
-       if (PageHuge(page))
-               return false;
-       for (i = 0; i < hpage_nr_pages(page); i++) {
-               if (atomic_read(&page[i]._mapcount) >= 0)
-                       return true;
-       }
-       return false;
-}
+bool page_mapped(struct page *page);
 
 /*
  * Return true only if the page has been allocated with

diff --git a/mm/util.c b/mm/util.c
index 6cc81e7..8a1b3a1 100644 (file)
--- a/mm/util.c
+++ b/mm/util.c
@@ -346,6 +346,29 @@ void *page_rmapping(struct page *page)
        return __page_rmapping(page);
 }
 
+/*
+ * Return true if this page is mapped into pagetables.
+ * For compound page it returns true if any subpage of compound page is mapped.
+ */
+bool page_mapped(struct page *page)
+{
+       int i;
+
+       if (likely(!PageCompound(page)))
+               return atomic_read(&page->_mapcount) >= 0;
+       page = compound_head(page);
+       if (atomic_read(compound_mapcount_ptr(page)) >= 0)
+               return true;
+       if (PageHuge(page))
+               return false;
+       for (i = 0; i < hpage_nr_pages(page); i++) {
+               if (atomic_read(&page[i]._mapcount) >= 0)
+                       return true;
+       }
+       return false;
+}
+EXPORT_SYMBOL(page_mapped);
+
 struct anon_vma *page_anon_vma(struct page *page)
 {
        unsigned long mapping;