FS-Cache: Count the number of initialised operations

Count and display through /proc/fs/fscache/stats the number of initialised
operations.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Steve Dickson <steved@redhat.com>
Acked-by: Jeff Layton <jeff.layton@primarydata.com>
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index 87c4544..a632251 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -165,6 +165,7 @@
 extern atomic_t fscache_n_op_run;
 extern atomic_t fscache_n_op_enqueue;
 extern atomic_t fscache_n_op_deferred_release;
+extern atomic_t fscache_n_op_initialised;
 extern atomic_t fscache_n_op_release;
 extern atomic_t fscache_n_op_gc;
 extern atomic_t fscache_n_op_cancelled;