mm, hugetlb: mark some bootstrap functions as __init

Both prep_compound_huge_page() and prep_compound_gigantic_page() are
only called at bootstrap and can be marked as __init.

The __SetPageTail(page) in prep_compound_gigantic_page() happening
before page->first_page is initialized is not concerning since this is
bootstrap.

Signed-off-by: David Rientjes <[email protected]>
Reviewed-by: Michal Hocko <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Reviewed-by: Davidlohr Bueso <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 38d9bed88dc8910dfb91cc7875386598e6db6f5f..7c02b9dadfb05b28e2aef363523f021f933bdb6d 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -689,7 +689,8 @@ static void prep_new_huge_page(struct hstate *h, struct page *page, int nid)
        put_page(page); /* free it into the hugepage allocator */
 }
 
-static void prep_compound_gigantic_page(struct page *page, unsigned long order)
+static void __init prep_compound_gigantic_page(struct page *page,
+                                              unsigned long order)
 {
        int i;
        int nr_pages = 1 << order;
@@ -1319,7 +1320,7 @@ found:
        return 1;
 }
 
-static void prep_compound_huge_page(struct page *page, int order)
+static void __init prep_compound_huge_page(struct page *page, int order)
 {
        if (unlikely(order > (MAX_ORDER - 1)))
                prep_compound_gigantic_page(page, order);