GFS2: Move journal live test at transaction start

There seems little point grabbing the transaction glock
only to have to release it again if the journal isn't
live. This moves the test earlier to avoid grabbing the lock
when we don't need it in the first place.

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

1 files changed, 3 insertions, 6 deletions

diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index 053752d4b27f..4ef0e9fa3549 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -33,6 +33,9 @@ int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
         BUG_ON(current->journal_info);
         BUG_ON(blocks == 0 && revokes == 0);
 
+        if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
+                return -EROFS;
+
         tr = kzalloc(sizeof(struct gfs2_trans), GFP_NOFS);
         if (!tr)
                 return -ENOMEM;
@@ -54,12 +57,6 @@ int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
         if (error)
                 goto fail_holder_uninit;
 
-        if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
-                tr->tr_t_gh.gh_flags |= GL_NOCACHE;
-                error = -EROFS;
-                goto fail_gunlock;
-        }
-
         error = gfs2_log_reserve(sdp, tr->tr_reserved);
         if (error)
                 goto fail_gunlock;