[various] remove dead code.

Squashes warnings from clang++

block-cache/copier.cc

@@ -13,7 +13,6 @@ copier::copier(io_engine &engine,
 	       sector_t block_size, size_t mem)
 	: pool_(block_size * 512, mem, PAGE_SIZE),
 	  block_size_(block_size),
-	  nr_blocks_(mem / block_size),
 	  engine_(engine),
 	  src_handle_(engine_.open_file(src, io_engine::M_READ_ONLY)),
 	  dest_handle_(engine_.open_file(dest, io_engine::M_READ_WRITE)),

block-cache/copier.h

@@ -88,7 +88,6 @@ namespace bcache {
 
 		mempool pool_;
 		sector_t block_size_;
-		unsigned nr_blocks_;
 		io_engine &engine_;
 		io_engine::handle src_handle_;
 		io_engine::handle dest_handle_;

caching/cache_writeback.cc

@@ -103,7 +103,6 @@ namespace {
 			: copier_(c),
 			  block_size_(c.get_block_size()),
 			  only_dirty_(only_dirty),
-			  list_failed_blocks_(list_failed_blocks),
 			  batch_(sort_buffer),
 			  monitor_(monitor),
 			  cache_blocks_(cache_blocks) {
@@ -228,7 +227,6 @@ namespace {
 		copier &copier_;
 		unsigned block_size_;
 		bool only_dirty_;
-		bool list_failed_blocks_;
 
 		copy_stats stats_;
 		copy_batch batch_;

caching/metadata.cc

@@ -8,8 +8,6 @@ namespace pd = persistent_data;
 //----------------------------------------------------------------
 
 namespace {
-	unsigned const METADATA_CACHE_SIZE = 1024;
-
 	// FIXME: duplication
 	transaction_manager::ptr
 	open_tm(block_manager<>::ptr bm) {

caching/restore_emitter.cc

@@ -12,8 +12,7 @@ namespace {
 	class restorer : public emitter {
 	public:
 		restorer(metadata::ptr md, bool clean_shutdown, unsigned metadata_version)
-			: in_superblock_(false),
-			  md_(md),
+			: md_(md),
 			  clean_shutdown_(clean_shutdown),
 			  metadata_version_(metadata_version) {
 		}
@@ -104,7 +103,6 @@ namespace {
 		}
 
 	private:
-		bool in_superblock_;
 		metadata::ptr md_;
 		bool clean_shutdown_;
 		unsigned metadata_version_;

caching/superblock.cc

@@ -289,8 +289,6 @@ superblock_invalid::visit(damage_visitor &v) const
 namespace validator {
 	using namespace persistent_data;
 
-        uint32_t const VERSION = 1;
-        unsigned const SECTOR_TO_BLOCK_SHIFT = 3;
 	uint32_t const SUPERBLOCK_CSUM_SEED = 9031977;
 
 	struct sb_validator : public bcache::validator {

era/metadata.cc

@@ -6,8 +6,6 @@ using namespace era;
 //----------------------------------------------------------------
 
 namespace {
-	unsigned const METADATA_CACHE_SIZ = 1024;
-
 	// FIXME: duplication
 	transaction_manager::ptr
 	open_tm(block_manager<>::ptr bm) {

era/restore_emitter.cc

@@ -99,7 +99,6 @@ namespace {
 		pd::bitset::ptr bits_;
 
 		bool in_era_array_;
-		uint32_t nr_blocks_;
 	};
 }
 

era/superblock.cc

@@ -208,8 +208,6 @@ superblock_invalid::visit(damage_visitor &v) const
 namespace era_validator {
 	using namespace persistent_data;
 
-        uint32_t const VERSION = 1;
-        unsigned const SECTOR_TO_BLOCK_SHIFT = 3;
 	uint32_t const SUPERBLOCK_CSUM_SEED = 146538381;
 
 	// FIXME: turn into a template, we have 3 similar classes now

persistent-data/data-structures/bloom_filter.cc

@@ -37,8 +37,7 @@ namespace {
 
 bloom_filter::bloom_filter(transaction_manager &tm,
 			   unsigned nr_bits, unsigned nr_probes)
-	: tm_(tm),
-	  bits_(tm),
+	: bits_(tm),
 	  nr_probes_(nr_probes),
 	  mask_(nr_bits - 1)
 {
@@ -48,8 +47,7 @@ bloom_filter::bloom_filter(transaction_manager &tm,
 
 bloom_filter::bloom_filter(transaction_manager &tm, block_address root,
 			   unsigned nr_bits, unsigned nr_probes)
-	: tm_(tm),
-	  bits_(tm, root, nr_bits),
+	: bits_(tm, root, nr_bits),
 	  nr_probes_(nr_probes),
 	  mask_(nr_bits - 1)
 {

persistent-data/data-structures/bloom_filter.h

@@ -33,7 +33,6 @@ namespace persistent_data {
 
 		void fill_probes(block_address b, std::vector<unsigned> &probes) const;
 
-		transaction_manager &tm_;
 		persistent_data::bitset bits_;
 		unsigned nr_probes_;
 		uint64_t mask_;

persistent-data/space-maps/disk.cc

@@ -586,30 +586,20 @@ namespace {
 
 	class ie_value_visitor {
 	public:
-		ie_value_visitor(index_entry_visitor &v)
-			: v_(v) {
-		}
+		ie_value_visitor(index_entry_visitor &v) {}
 
 		virtual void visit(btree_path const &path, sm_disk_detail::index_entry const &ie) {
 			// FIXME: finish
 		}
-
-	private:
-		index_entry_visitor &v_;
 	};
 
 	class ie_damage_visitor {
 	public:
-		ie_damage_visitor(index_entry_visitor &v)
-			: v_(v) {
-		}
+		ie_damage_visitor(index_entry_visitor &v) {}
 
 		virtual void visit(btree_path const &path, btree_detail::damage const &d) {
 			// FIXME: finish
 		}
-
-	private:
-		index_entry_visitor &v_;
 	};
 
 	class btree_index_store : public index_store {

thin-provisioning/superblock.cc

@@ -85,8 +85,6 @@ namespace {
 	using namespace persistent_data;
 	using namespace superblock_detail;
 
-        uint32_t const VERSION = 1;
-        unsigned const SECTOR_TO_BLOCK_SHIFT = 3;
 	uint32_t const SUPERBLOCK_CSUM_SEED = 160774;
 
 	struct sb_validator : public bcache::validator {