--- a/src/core/ngx_shmtx.c
+++ b/src/core/ngx_shmtx.c
@@ -12,7 +12,7 @@
 
 
 ngx_int_t
-ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name, ngx_log_t *log)
+ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name)
 {
     mtx->lock = addr;
 
@@ -23,14 +23,12 @@ ngx_shmtx_create(ngx_shmtx_t *mtx, void 
 
 
 ngx_int_t
-ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name, ngx_log_t *log)
+ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name)
 {
     if (mtx->name) {
 
         if (ngx_strcmp(name, mtx->name) == 0) {
             mtx->name = name;
-            mtx->log = log;
-
             return NGX_OK;
         }
 
@@ -40,18 +38,17 @@ ngx_shmtx_create(ngx_shmtx_t *mtx, void 
     mtx->fd = ngx_open_file(name, NGX_FILE_RDWR, NGX_FILE_CREATE_OR_OPEN);
 
     if (mtx->fd == NGX_INVALID_FILE) {
-        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
+        ngx_log_error(NGX_LOG_EMERG, ngx_cycle->log, ngx_errno,
                       ngx_open_file_n " \"%s\" failed", name);
         return NGX_ERROR;
     }
 
     if (ngx_delete_file(name) == NGX_FILE_ERROR) {
-        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
+        ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
                       ngx_delete_file_n " \"%s\" failed", name);
     }
 
     mtx->name = name;
-    mtx->log = log;
 
     return NGX_OK;
 }
@@ -61,7 +58,7 @@ void
 ngx_shmtx_destory(ngx_shmtx_t *mtx)
 {
     if (ngx_close_file(mtx->fd) == NGX_FILE_ERROR) {
-        ngx_log_error(NGX_LOG_ALERT, mtx->log, ngx_errno,
+        ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, ngx_errno,
                       ngx_close_file_n " \"%s\" failed", mtx->name);
     }
 }