From 64590f45ddc7147fa1968147a1f5b5c436b728fe Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 15 Dec 2014 12:56:57 +1100 Subject: [PATCH] md: make merge_bvec_fn more robust in face of personality changes. There is no locking around calls to merge_bvec_fn(), so it is possible that calls which coincide with a level (or personality) change could go wrong. So create a central dispatch point for these functions and use rcu_read_lock(). If the array is suspended, reject any merge that can be rejected. If not, we know it is safe to call the function. Signed-off-by: NeilBrown --- Reading git-format-patch failed