[PATCH 5.4 01/72] gfs2: initialize transaction tr_ailX_lists earlier

[Greg Kroah-Hartman]

From: Bob Peterson <rpete...@redhat.com>

commit cbcc89b630447ec7836aa2b9242d9bb1725f5a61 upstream.

Since transactions may be freed shortly after they're created, before
a log_flush occurs, we need to initialize their ail1 and ail2 lists
earlier. Before this patch, the ail1 list was initialized in gfs2_log_flush().
This moves the initialization to the point when the transaction is first
created.

Signed-off-by: Bob Peterson <rpete...@redhat.com>
Signed-off-by: Andreas Gruenbacher <agrue...@redhat.com>
Cc: Salvatore Bonaccorso <car...@debian.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 fs/gfs2/glops.c |    2 ++
 fs/gfs2/log.c   |    2 --
 fs/gfs2/trans.c |    2 ++
 3 files changed, 4 insertions(+), 2 deletions(-)

--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -87,6 +87,8 @@ static void gfs2_ail_empty_gl(struct gfs
        memset(&tr, 0, sizeof(tr));
        INIT_LIST_HEAD(&tr.tr_buf);
        INIT_LIST_HEAD(&tr.tr_databuf);
+       INIT_LIST_HEAD(&tr.tr_ail1_list);
+       INIT_LIST_HEAD(&tr.tr_ail2_list);
        tr.tr_revokes = atomic_read(&gl->gl_ail_count);
 
        if (!tr.tr_revokes) {
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -810,8 +810,6 @@ void gfs2_log_flush(struct gfs2_sbd *sdp
        tr = sdp->sd_log_tr;
        if (tr) {
                sdp->sd_log_tr = NULL;
-               INIT_LIST_HEAD(&tr->tr_ail1_list);
-               INIT_LIST_HEAD(&tr->tr_ail2_list);
                tr->tr_first = sdp->sd_log_flush_head;
                if (unlikely (state == SFS_FROZEN))
                        gfs2_assert_withdraw(sdp, !tr->tr_num_buf_new && 
!tr->tr_num_databuf_new);
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -53,6 +53,8 @@ int gfs2_trans_begin(struct gfs2_sbd *sd
                                                   sizeof(u64));
        INIT_LIST_HEAD(&tr->tr_databuf);
        INIT_LIST_HEAD(&tr->tr_buf);
+       INIT_LIST_HEAD(&tr->tr_ail1_list);
+       INIT_LIST_HEAD(&tr->tr_ail2_list);
 
        sb_start_intwrite(sdp->sd_vfs);