[PATCH] ubifs: Change gfp flags in page allocation for bulk read

[Hyunchul Lee]

From: Hyunchul Lee <cheol....@lge.com>

Use readahead_gfp_mask for gfp flags when allocating pages.
This set additional flags which are __GFP_NORETRY and
__GFP_NOWARN. So OOMs and a failure message can be
avoided.
And we should remove __GFP_FS from flags to prevent from
calling ubifs_writepage during page reclaim.

Signed-off-by: Hyunchul Lee <cheol....@lge.com>
---
 fs/ubifs/file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index d9ae86f..4396c04 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -735,6 +735,7 @@ static int ubifs_do_bulk_read(struct ubifs_info *c, struct 
bu_info *bu,
        int err, page_idx, page_cnt, ret = 0, n = 0;
        int allocate = bu->buf ? 0 : 1;
        loff_t isize;
+       gfp_t ra_gfp_mask = readahead_gfp_mask(mapping) & ~__GFP_FS;
 
        err = ubifs_tnc_get_bu_keys(c, bu);
        if (err)
@@ -796,8 +797,7 @@ static int ubifs_do_bulk_read(struct ubifs_info *c, struct 
bu_info *bu,
 
                if (page_offset > end_index)
                        break;
-               page = find_or_create_page(mapping, page_offset,
-                                          GFP_NOFS | __GFP_COLD);
+               page = find_or_create_page(mapping, page_offset, ra_gfp_mask);
                if (!page)
                        break;
                if (!PageUptodate(page))
-- 
1.9.1