Merge pull request #12032 from liewegas/wip-bluestore-warning

os/bluestore: fix warning and uninit variable

Reviewed-by: xie xingguo <xie.xingguo@zte.com.cn>

src/include/mempool.h

@@ -418,10 +418,14 @@ DEFINE_MEMORY_POOLS_HELPER(P)
 //
 #define MEMPOOL_CLASS_HELPERS()						\
   void *operator new(size_t size);					\
-  void *operator new[](size_t size) { assert(0 == "no array new"); }	\
+  void *operator new[](size_t size) {					\
+    assert(0 == "no array new");					\
+    return (void*)1;							\
+  }									\
   void  operator delete(void *);					\
   void  operator delete[](void *) { assert(0 == "no array delete"); }
 
+
 // Use this in some particular .cc file to match each class with a
 // MEMPOOL_CLASS_HELPERS().
 #define MEMPOOL_DEFINE_OBJECT_FACTORY(obj,factoryname,pool)		\

src/os/bluestore/KernelDevice.h

@@ -67,7 +67,7 @@ class KernelDevice : public BlockDevice {
   // stalled aio debugging
   FS::aio_list_t debug_queue;
   std::mutex debug_queue_lock;
-  FS::aio_t *debug_oldest;
+  FS::aio_t *debug_oldest = nullptr;
   utime_t debug_stall_since;
   void debug_aio_link(FS::aio_t& aio);
   void debug_aio_unlink(FS::aio_t& aio);