Follow-up to MDEV-13690: Remove unused globals

buf_flush_batch(), buf_flush_stats(): Declare static.

buf_flush_common(): Remove (unused function).

storage/innobase/buf/buf0flu.cc

@@ -1870,6 +1870,7 @@ not guaranteed that the actual number is that big, though)
 @param[in]	lsn_limit	in the case of BUF_FLUSH_LIST all blocks whose
 oldest_modification is smaller than this should be flushed (if their number
 does not exceed min_n), otherwise ignored */
+static
 void
 buf_flush_batch(
 	buf_pool_t*		buf_pool,
@@ -1909,6 +1910,7 @@ Gather the aggregated stats for both flush list and LRU list flushing.
 @param page_count_flush	number of pages flushed from the end of the flush_list
 @param page_count_LRU	number of pages flushed from the end of the LRU list
 */
+static
 void
 buf_flush_stats(
 /*============*/
@@ -1925,6 +1927,7 @@ buf_flush_stats(
 
 /******************************************************************//**
 Start a buffer flush batch for LRU or flush list */
+static
 ibool
 buf_flush_start(
 /*============*/
@@ -1955,23 +1958,9 @@ buf_flush_start(
 	return(TRUE);
 }
 
-/******************************************************************//**
-Gather the aggregated stats for both flush list and LRU list flushing */
-void
-buf_flush_common(
-/*=============*/
-	buf_flush_t	flush_type,	/*!< in: type of flush */
-	ulint		page_count)	/*!< in: number of pages flushed */
-{
-	buf_dblwr_flush_buffered_writes();
-
-	ut_a(flush_type == BUF_FLUSH_LRU || flush_type == BUF_FLUSH_LIST);
-
-	srv_stats.buf_pool_flushed.add(page_count);
-}
-
 /******************************************************************//**
 End a buffer flush batch for LRU or flush list */
+static
 void
 buf_flush_end(
 /*==========*/

storage/innobase/include/buf0flu.h

 /*****************************************************************************
 
 Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2014, 2017, MariaDB Corporation.
+Copyright (c) 2014, 2018, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -424,57 +424,6 @@ class FlushObserver {
 	bool			m_interrupted;
 };
 
-/******************************************************************//**
-Start a buffer flush batch for LRU or flush list */
-ibool
-buf_flush_start(
-/*============*/
-	buf_pool_t*	buf_pool,	/*!< buffer pool instance */
-	buf_flush_t	flush_type);	/*!< in: BUF_FLUSH_LRU
-					or BUF_FLUSH_LIST */
-/******************************************************************//**
-End a buffer flush batch for LRU or flush list */
-void
-buf_flush_end(
-/*==========*/
-	buf_pool_t*	buf_pool,	/*!< buffer pool instance */
-	buf_flush_t	flush_type);	/*!< in: BUF_FLUSH_LRU
-					or BUF_FLUSH_LIST */
-/******************************************************************//**
-Gather the aggregated stats for both flush list and LRU list flushing */
-void
-buf_flush_common(
-/*=============*/
-	buf_flush_t	flush_type,	/*!< in: type of flush */
-	ulint		page_count);	/*!< in: number of pages flushed */
-
-/*******************************************************************//**
-This utility flushes dirty blocks from the end of the LRU list or flush_list.
-NOTE 1: in the case of an LRU flush the calling thread may own latches to
-pages: to avoid deadlocks, this function must be written so that it cannot
-end up waiting for these latches! NOTE 2: in the case of a flush list flush,
-the calling thread is not allowed to own any latches on pages! */
-__attribute__((nonnull))
-void
-buf_flush_batch(
-/*============*/
-	buf_pool_t*	buf_pool,	/*!< in: buffer pool instance */
-	buf_flush_t	flush_type,	/*!< in: BUF_FLUSH_LRU or
-					BUF_FLUSH_LIST; if BUF_FLUSH_LIST,
-					then the caller must not own any
-					latches on pages */
-	ulint		min_n,		/*!< in: wished minimum mumber of blocks
-					flushed (it is not guaranteed that the
-					actual number is that big, though) */
-	lsn_t		lsn_limit,	/*!< in: in the case of BUF_FLUSH_LIST
-					all blocks whose oldest_modification is
-					smaller than this should be flushed
-					(if their number does not exceed
-					min_n), otherwise ignored */
-	flush_counters_t*	n);	/*!< out: flushed/evicted page
-					counts  */
-
-
 #include "buf0flu.ic"
 
 #endif