Print the afs_operation debug_id when logging an unexpected change in the
data version.  This allows the logged message to be matched against
tracelines.

Signed-off-by: David Howells <dhowe...@redhat.com>
cc: linux-...@lists.infradead.org
cc: linux-cach...@redhat.com
cc: linux-fsde...@vger.kernel.org
Link: 
https://lore.kernel.org/r/160588528377.3465195.2206051235095182302.st...@warthog.procyon.org.uk/
 # rfc
Link: 
https://lore.kernel.org/r/161118146111.1232039.11398082422487058312.st...@warthog.procyon.org.uk/
 # rfc
Link: 
https://lore.kernel.org/r/161161042180.2537118.2471333561661033316.st...@warthog.procyon.org.uk/
 # v2
Link: 
https://lore.kernel.org/r/161340405772.1303470.3877167548944248214.st...@warthog.procyon.org.uk/
 # v3
Link: 
https://lore.kernel.org/r/161539549628.286939.15234870409714613954.st...@warthog.procyon.org.uk/
 # v4
---

 fs/afs/inode.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 48519ee00eef..af6556bb3d6a 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -215,11 +215,12 @@ static void afs_apply_status(struct afs_operation *op,
 
        if (vp->dv_before + vp->dv_delta != status->data_version) {
                if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags))
-                       pr_warn("kAFS: vnode modified {%llx:%llu} %llx->%llx 
%s\n",
+                       pr_warn("kAFS: vnode modified {%llx:%llu} %llx->%llx %s 
(op=%x)\n",
                                vnode->fid.vid, vnode->fid.vnode,
                                (unsigned long long)vp->dv_before + 
vp->dv_delta,
                                (unsigned long long)status->data_version,
-                               op->type ? op->type->name : "???");
+                               op->type ? op->type->name : "???",
+                               op->debug_id);
 
                vnode->invalid_before = status->data_version;
                if (vnode->status.type == AFS_FTYPE_DIR) {


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