Bug#59707 Unused compression-related parameters in buffer pool functions

buf_block_alloc(): ulint zip_size is always 0.
buf_LRU_get_free_block(): ulint zip_size is always 0.
buf_LRU_free_block(): ibool* buf_pool_mutex_released is always NULL.

Remove these parameters.

buf_LRU_get_free_block(): Simplify the initialization of block->page.zip
and release buf_pool_mutex() earlier.

storage/innodb_plugin/ChangeLog

+2011-01-25	The InnoDB Team
+
+	* btr/btr0btr.c, btr/btr0cur.c, btr/btr0sea.c,
+	buf/buf0buddy.c, buf/buf0buf.c, buf/buf0lru.c,
+	include/buf0buf.h, include/buf0buf.ic, include/buf0lru.h,
+	mem/mem0mem.c, page/page0zip.c:
+	Fix Bug#59707 Unused compression-related parameters
+	in buffer pool functions
+
 2011-01-18	The InnoDB Team
 
 	* include/sync0rw.h, sync/sync0arr.c, sync/sync0rw.c:

storage/innodb_plugin/btr/btr0btr.c

@@ -979,7 +979,7 @@ btr_page_reorganize_low(
 	log_mode = mtr_set_log_mode(mtr, MTR_LOG_NONE);
 
 #ifndef UNIV_HOTBACKUP
-	temp_block = buf_block_alloc(0);
+	temp_block = buf_block_alloc();
 #else /* !UNIV_HOTBACKUP */
 	ut_ad(block == back_block1);
 	temp_block = back_block2;

storage/innodb_plugin/btr/btr0cur.c

@@ -3767,13 +3767,12 @@ btr_blob_free(
 	    && buf_block_get_space(block) == space
 	    && buf_block_get_page_no(block) == page_no) {
 
-		if (buf_LRU_free_block(&block->page, all, NULL)
-		    != BUF_LRU_FREED
+		if (buf_LRU_free_block(&block->page, all) != BUF_LRU_FREED
 		    && all && block->page.zip.data) {
 			/* Attempt to deallocate the uncompressed page
 			if the whole block cannot be deallocted. */
 
-			buf_LRU_free_block(&block->page, FALSE, NULL);
+			buf_LRU_free_block(&block->page, FALSE);
 		}
 	}
 

storage/innodb_plugin/btr/btr0sea.c

@@ -141,7 +141,7 @@ btr_search_check_free_space_in_heap(void)
 	be enough free space in the hash table. */
 
 	if (heap->free_block == NULL) {
-		buf_block_t*	block = buf_block_alloc(0);
+		buf_block_t*	block = buf_block_alloc();
 
 		rw_lock_x_lock(&btr_search_latch);
 

storage/innodb_plugin/buf/buf0buddy.c

@@ -327,7 +327,7 @@ buf_buddy_alloc_low(
 
 	/* Try replacing an uncompressed page in the buffer pool. */
 	buf_pool_mutex_exit();
-	block = buf_LRU_get_free_block(0);
+	block = buf_LRU_get_free_block();
 	*lru = TRUE;
 	buf_pool_mutex_enter();
 

storage/innodb_plugin/buf/buf0buf.c

@@ -1283,7 +1283,7 @@ buf_pool_shrink(
 
 				buf_LRU_make_block_old(&block->page);
 				dirty++;
-			} else if (buf_LRU_free_block(&block->page, TRUE, NULL)
+			} else if (buf_LRU_free_block(&block->page, TRUE)
 				   != BUF_LRU_FREED) {
 				nonfree++;
 			}
@@ -1729,8 +1729,7 @@ buf_page_get_zip(
 		mutex_enter(block_mutex);
 
 		/* Discard the uncompressed page frame if possible. */
-		if (buf_LRU_free_block(bpage, FALSE, NULL)
-		    == BUF_LRU_FREED) {
+		if (buf_LRU_free_block(bpage, FALSE) == BUF_LRU_FREED) {
 
 			mutex_exit(block_mutex);
 			goto lookup;
@@ -2165,7 +2164,7 @@ buf_page_get_gen(
 		buf_pool_mutex_exit();
 		mutex_exit(&buf_pool_zip_mutex);
 
-		block = buf_LRU_get_free_block(0);
+		block = buf_LRU_get_free_block();
 		ut_a(block);
 
 		buf_pool_mutex_enter();
@@ -2291,8 +2290,7 @@ buf_page_get_gen(
 		/* Try to evict the block from the buffer pool, to use the
 		insert buffer as much as possible. */
 
-		if (buf_LRU_free_block(&block->page, TRUE, NULL)
-		    == BUF_LRU_FREED) {
+		if (buf_LRU_free_block(&block->page, TRUE) == BUF_LRU_FREED) {
 			buf_pool_mutex_exit();
 			mutex_exit(&block->mutex);
 			fprintf(stderr,
@@ -2829,7 +2827,7 @@ buf_page_init_for_read(
 	    && UNIV_LIKELY(!recv_recovery_is_on())) {
 		block = NULL;
 	} else {
-		block = buf_LRU_get_free_block(0);
+		block = buf_LRU_get_free_block();
 		ut_ad(block);
 	}
 
@@ -3001,7 +2999,7 @@ buf_page_create(
 	ut_ad(mtr->state == MTR_ACTIVE);
 	ut_ad(space || !zip_size);
 
-	free_block = buf_LRU_get_free_block(0);
+	free_block = buf_LRU_get_free_block();
 
 	buf_pool_mutex_enter();
 

storage/innodb_plugin/buf/buf0lru.c

@@ -575,7 +575,7 @@ buf_LRU_free_from_unzip_LRU_list(
 		ut_ad(block->page.in_LRU_list);
 
 		mutex_enter(&block->mutex);
-		freed = buf_LRU_free_block(&block->page, FALSE, NULL);
+		freed = buf_LRU_free_block(&block->page, FALSE);
 		mutex_exit(&block->mutex);
 
 		switch (freed) {
@@ -636,7 +636,7 @@ buf_LRU_free_from_common_LRU_list(
 
 		mutex_enter(block_mutex);
 		accessed = buf_page_is_accessed(bpage);
-		freed = buf_LRU_free_block(bpage, TRUE, NULL);
+		freed = buf_LRU_free_block(bpage, TRUE);
 		mutex_exit(block_mutex);
 
 		switch (freed) {
@@ -798,10 +798,8 @@ LRU list to the free list.
 @return	the free control block, in state BUF_BLOCK_READY_FOR_USE */
 UNIV_INTERN
 buf_block_t*
-buf_LRU_get_free_block(
-/*===================*/
-	ulint	zip_size)	/*!< in: compressed page size in bytes,
-				or 0 if uncompressed tablespace */
+buf_LRU_get_free_block(void)
+/*========================*/
 {
 	buf_block_t*	block		= NULL;
 	ibool		freed;
@@ -877,26 +875,10 @@ buf_LRU_get_free_block(
 
 	/* If there is a block in the free list, take it */
 	block = buf_LRU_get_free_only();
-	if (block) {
-
-#ifdef UNIV_DEBUG
-		block->page.zip.m_start =
-#endif /* UNIV_DEBUG */
-			block->page.zip.m_end =
-			block->page.zip.m_nonempty =
-			block->page.zip.n_blobs = 0;
-
-		if (UNIV_UNLIKELY(zip_size)) {
-			ibool	lru;
-			page_zip_set_size(&block->page.zip, zip_size);
-			block->page.zip.data = buf_buddy_alloc(zip_size, &lru);
-			UNIV_MEM_DESC(block->page.zip.data, zip_size, block);
-		} else {
-			page_zip_set_size(&block->page.zip, 0);
-			block->page.zip.data = NULL;
-		}
+	buf_pool_mutex_exit();
 
-		buf_pool_mutex_exit();
+	if (block) {
+		memset(&block->page.zip, 0, sizeof block->page.zip);
 
 		if (started_monitor) {
 			srv_print_innodb_monitor = mon_value_was;
@@ -908,8 +890,6 @@ buf_LRU_get_free_block(
 	/* If no block was in the free list, search from the end of the LRU
 	list and try to free a block there */
 
-	buf_pool_mutex_exit();
-
 	freed = buf_LRU_search_and_free_block(n_iterations);
 
 	if (freed > 0) {
@@ -1378,12 +1358,8 @@ enum buf_lru_free_block_status
 buf_LRU_free_block(
 /*===============*/
 	buf_page_t*	bpage,	/*!< in: block to be freed */
-	ibool		zip,	/*!< in: TRUE if should remove also the
+	ibool		zip)	/*!< in: TRUE if should remove also the
 				compressed page of an uncompressed page */
-	ibool*		buf_pool_mutex_released)
-				/*!< in: pointer to a variable that will
-				be assigned TRUE if buf_pool_mutex
-				was temporarily released, or NULL */
 {
 	buf_page_t*	b = NULL;
 	mutex_t*	block_mutex = buf_page_get_mutex(bpage);
@@ -1554,10 +1530,6 @@ buf_LRU_free_block(
 			b->io_fix = BUF_IO_READ;
 		}
 
-		if (buf_pool_mutex_released) {
-			*buf_pool_mutex_released = TRUE;
-		}
-
 		buf_pool_mutex_exit();
 		mutex_exit(block_mutex);
 

storage/innodb_plugin/include/buf0buf.h

@@ -165,10 +165,8 @@ Allocates a buffer block.
 @return	own: the allocated block, in state BUF_BLOCK_MEMORY */
 UNIV_INLINE
 buf_block_t*
-buf_block_alloc(
-/*============*/
-	ulint	zip_size);	/*!< in: compressed page size in bytes,
-				or 0 if uncompressed tablespace */
+buf_block_alloc(void);
+/*=================*/
 /********************************************************************//**
 Frees a buffer block which does not contain a file page. */
 UNIV_INLINE

storage/innodb_plugin/include/buf0buf.ic

@@ -719,14 +719,12 @@ Allocates a buffer block.
 @return	own: the allocated block, in state BUF_BLOCK_MEMORY */
 UNIV_INLINE
 buf_block_t*
-buf_block_alloc(
-/*============*/
-	ulint	zip_size)	/*!< in: compressed page size in bytes,
-				or 0 if uncompressed tablespace */
+buf_block_alloc(void)
+/*=================*/
 {
 	buf_block_t*	block;
 
-	block = buf_LRU_get_free_block(zip_size);
+	block = buf_LRU_get_free_block();
 
 	buf_block_set_state(block, BUF_BLOCK_MEMORY);
 

storage/innodb_plugin/include/buf0lru.h

@@ -110,12 +110,9 @@ enum buf_lru_free_block_status
 buf_LRU_free_block(
 /*===============*/
 	buf_page_t*	bpage,	/*!< in: block to be freed */
-	ibool		zip,	/*!< in: TRUE if should remove also the
+	ibool		zip)	/*!< in: TRUE if should remove also the
 				compressed page of an uncompressed page */
-	ibool*		buf_pool_mutex_released);
-				/*!< in: pointer to a variable that will
-				be assigned TRUE if buf_pool_mutex
-				was temporarily released, or NULL */
+	__attribute__((nonnull));
 /******************************************************************//**
 Try to free a replaceable block.
 @return	TRUE if found and freed */
@@ -146,10 +143,9 @@ LRU list to the free list.
 @return	the free control block, in state BUF_BLOCK_READY_FOR_USE */
 UNIV_INTERN
 buf_block_t*
-buf_LRU_get_free_block(
-/*===================*/
-	ulint	zip_size);	/*!< in: compressed page size in bytes,
-				or 0 if uncompressed tablespace */
+buf_LRU_get_free_block(void)
+/*========================*/
+	__attribute__((warn_unused_result));
 
 /******************************************************************//**
 Puts a block back to the free list. */

storage/innodb_plugin/mem/mem0mem.c

@@ -347,7 +347,7 @@ mem_heap_create_block(
 				return(NULL);
 			}
 		} else {
-			buf_block = buf_block_alloc(0);
+			buf_block = buf_block_alloc();
 		}
 
 		block = (mem_block_t*) buf_block->frame;

storage/innodb_plugin/page/page0zip.c

@@ -4439,7 +4439,7 @@ page_zip_reorganize(
 	log_mode = mtr_set_log_mode(mtr, MTR_LOG_NONE);
 
 #ifndef UNIV_HOTBACKUP
-	temp_block = buf_block_alloc(0);
+	temp_block = buf_block_alloc();
 	btr_search_drop_page_hash_index(block);
 	block->check_index_page_at_flush = TRUE;
 #else /* !UNIV_HOTBACKUP */