[patch 4/4] Btrfs: pass __GFP_WRITE for buffered write page allocations

[Johannes Weiner <jweiner@xxxxxxxxxx>]

Tell the page allocator that pages allocated for a buffered write are
expected to become dirty soon.

Signed-off-by: Johannes Weiner <jweiner@xxxxxxxxxx>
---
 fs/btrfs/file.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index e7872e4..ea1b892 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1084,7 +1084,7 @@ static noinline int prepare_pages(struct btrfs_root 
*root, struct file *file,
 again:
        for (i = 0; i < num_pages; i++) {
                pages[i] = find_or_create_page(inode->i_mapping, index + i,
-                                              GFP_NOFS);
+                                              GFP_NOFS | __GFP_WRITE);
                if (!pages[i]) {
                        faili = i - 1;
                        err = -ENOMEM;
-- 
1.7.6