Inter-revision diff: cover letter

Comparing v7 (message) to v5 (message) 

--- v7
+++ v5
@@ -17,8 +17,6 @@
 v2: https://lore.kernel.org/all/b1d7fe43-ce84-0ed7-32f7-ea1d12d0b716@linux.alibaba.com/
 v3: https://lore.kernel.org/all/609b565a-ed6e-a1da-f025-166691b5d994@linux.alibaba.com/
 V4: https://lore.kernel.org/all/32a36348-69ee-6464-390c-3a8d6e9d2b53@linux.alibaba.com/
-V5: https://lore.kernel.org/all/3ca92dc9-ea04-ddc2-71cd-524bfa5a5721@linux.alibaba.com/
-V6: https://lore.kernel.org/all/df8e9b3e-504c-635d-4e92-99cdf9f05479@linux.alibaba.com/
 
 Michael Wang (2):
   ftrace: disable preemption when recursion locked
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