xip: fix get_zeroed_page with __GFP_HIGHMEM

The use of get_zeroed_page() with __GFP_HIGHMEM is invalid.  Use
alloc_page() with __GFP_ZERO instead of invalid get_zeroed_page().

(This patch is only compile tested)

Cc: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index e233fff61b4b..f874ae818ad3 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -25,14 +25,15 @@ static struct page *__xip_sparse_page;
 static struct page *xip_sparse_page(void)
 {
         if (!__xip_sparse_page) {
-                unsigned long zeroes = get_zeroed_page(GFP_HIGHUSER);
-                if (zeroes) {
+                struct page *page = alloc_page(GFP_HIGHUSER | __GFP_ZERO);
+
+                if (page) {
                         static DEFINE_SPINLOCK(xip_alloc_lock);
                         spin_lock(&xip_alloc_lock);
                         if (!__xip_sparse_page)
-                                __xip_sparse_page = virt_to_page(zeroes);
+                                __xip_sparse_page = page;
                         else
-                                free_page(zeroes);
+                                __free_page(page);
                         spin_unlock(&xip_alloc_lock);
                 }
         }