[GFS2] fix GFP_KERNEL misuses

There are several places where GFP_KERNEL allocations happen under a glock,
which will result in hangs if we're under memory pressure and go to re-enter the
fs in order to flush stuff out.  This patch changes the culprits to GFS_NOFS to
keep this problem from happening.  Thank you,

Signed-off-by: Josef Bacik <jbacik@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 88497b0b7339..7aeacbc65f35 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -210,7 +210,7 @@ int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
         struct page *page;
         struct bio *bio;
 
-        page = alloc_page(GFP_KERNEL);
+        page = alloc_page(GFP_NOFS);
         if (unlikely(!page))
                 return -ENOBUFS;
 
@@ -218,7 +218,7 @@ int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
         ClearPageDirty(page);
         lock_page(page);
 
-        bio = bio_alloc(GFP_KERNEL, 1);
+        bio = bio_alloc(GFP_NOFS, 1);
         if (unlikely(!bio)) {
                 __free_page(page);
                 return -ENOBUFS;