Move page initialization to better place.

storage/innobase/fil/fil0pagecompress.cc

@@ -461,9 +461,6 @@ fil_compress_page(
 		ut_a(block_size > 0);
 #endif
 		write_size =  (size_t)ut_uint64_align_up((ib_uint64_t)write_size, block_size);
-		/* Initialize rest of the written data to avoid
-		uninitialized bytes */
-		memset(out_buf+tmp, 0, write_size-tmp);
 #ifdef UNIV_DEBUG
 		ut_a(write_size > 0 && ((write_size % block_size) == 0));
 		ut_a(write_size >= tmp);
@@ -480,13 +477,6 @@ fil_compress_page(
 	srv_stats.page_compression_saved.add((len - write_size));
 	srv_stats.pages_page_compressed.inc();
 
-	if (!srv_use_trim) {
-		/* If persistent trims are not used we always write full
-		page and end of the page needs to be initialized.*/
-		memset(out_buf+write_size, 0, len-write_size);
-		write_size = len;
-	}
-
 	*out_len = write_size;
 
 	return(out_buf);

storage/xtradb/fil/fil0pagecompress.cc

@@ -458,9 +458,6 @@ fil_compress_page(
 		ut_a(block_size > 0);
 #endif
 		write_size =  (size_t)ut_uint64_align_up((ib_uint64_t)write_size, block_size);
-		/* Initialize rest of the written data to avoid
-		uninitialized bytes */
-		memset(out_buf+tmp, 0, write_size-tmp);
 #ifdef UNIV_DEBUG
 		ut_a(write_size > 0 && ((write_size % block_size) == 0));
 		ut_a(write_size >= tmp);
@@ -477,13 +474,6 @@ fil_compress_page(
 	srv_stats.page_compression_saved.add((len - write_size));
 	srv_stats.pages_page_compressed.inc();
 
-	if (!srv_use_trim) {
-		/* If persistent trims are not used we always write full
-		page and end of the page needs to be initialized.*/
-		memset(out_buf+write_size, 0, len-write_size);
-		write_size = len;
-	}
-
 	*out_len = write_size;
 
 	return(out_buf);