File rdrw_mutex.patch of Package sysbench

--- sysbench/tests/fileio/sb_fileio.c.orig	2007-10-26 12:12:10.000000000 +0200
+++ sysbench/tests/fileio/sb_fileio.c	2007-10-26 09:48:43.000000000 +0200
@@ -576,6 +576,7 @@
       return 1;
     case FILE_OP_TYPE_WRITE:
 
+      SB_THREAD_MUTEX_LOCK();
       /* Store checksum and offset in a buffer when in validation mode */
       if (sb_globals.validate)
         file_fill_buffer(buffer, file_req->size, file_req->pos);
@@ -601,7 +602,7 @@
         }
       }
 
-      SB_THREAD_MUTEX_LOCK();
+      //SB_THREAD_MUTEX_LOCK();
       write_ops++;
       real_write_ops++;
       bytes_written += file_req->size;
@@ -611,6 +612,7 @@
 
       break;
     case FILE_OP_TYPE_READ:
+      SB_THREAD_MUTEX_LOCK();
       LOG_EVENT_START(msg, thread_id);
       if(file_pread(file_req->file_id, buffer, file_req->size, file_req->pos,
                     thread_id)
@@ -631,8 +633,7 @@
                  file_req->file_id, file_req->pos);
         return 1;
       }
-      
-      SB_THREAD_MUTEX_LOCK();
+  //    SB_THREAD_MUTEX_LOCK();
       read_ops++;
       real_read_ops++;
       bytes_read += file_req->size;